diff --git a/boot.php b/boot.php
index e75b2abd91..dfedcdbbbe 100644
--- a/boot.php
+++ b/boot.php
@@ -82,17 +82,6 @@ define('MAX_IMAGE_LENGTH',        -1);
  */
 define('DEFAULT_DB_ENGINE',  'InnoDB');
 
-/**
- * @name SSL Policy
- *
- * SSL redirection policies
- * @{
- */
-define('SSL_POLICY_NONE',         0);
-define('SSL_POLICY_FULL',         1);
-define('SSL_POLICY_SELFSIGN',     2);
-/* @}*/
-
 /** @deprecated since version 2019.03, please use \Friendica\Module\Register::CLOSED instead */
 define('REGISTER_CLOSED',        \Friendica\Module\Register::CLOSED);
 /** @deprecated since version 2019.03, please use \Friendica\Module\Register::APPROVE instead */
diff --git a/config/defaults.config.php b/config/defaults.config.php
index 0d9e55c7d9..b42bc8c628 100644
--- a/config/defaults.config.php
+++ b/config/defaults.config.php
@@ -377,11 +377,6 @@ return [
 		// Maximum number of posts that a user can send per month with the API. 0 to disable monthly throttling.
 		'throttle_limit_month' => 0,
 
-		// urlpath (String)
-		// If you are using a subdirectory of your domain you will need to put the relative path (from the root of your domain) here.
-		// For instance if your URL is 'http://example.com/directory/subdirectory', set urlpath to 'directory/subdirectory'.
-		'urlpath' => '',
-
 		// username_min_length (Integer)
 		// The minimum character length a username can be.
 		// This length is check once the username has been trimmed and multiple spaces have been collapsed into one.
diff --git a/mod/admin.php b/mod/admin.php
index 0df907cbaa..db8bb403c1 100644
--- a/mod/admin.php
+++ b/mod/admin.php
@@ -32,6 +32,7 @@ use Friendica\Module\Tos;
 use Friendica\Protocol\PortableContact;
 use Friendica\Util\Arrays;
 use Friendica\Util\BasePath;
+use Friendica\Util\BaseURL;
 use Friendica\Util\DateTimeFormat;
 use Friendica\Util\Network;
 use Friendica\Util\Strings;
@@ -1041,9 +1042,6 @@ function admin_page_site_post(App $a)
 		update_table($a, "gcontact", ['connect', 'addr'], $old_host, $new_host);
 
 		// update config
-		$configFileSaver = new \Friendica\Util\Config\ConfigFileSaver($a->getBasePath());
-		$configFileSaver->addConfigValue('config', 'hostname', parse_url($new_url, PHP_URL_HOST));
-		$configFileSaver->saveToConfigFile();
 		Config::set('system', 'url', $new_url);
 		$a->setBaseURL($new_url);
 
@@ -1199,7 +1197,7 @@ function admin_page_site_post(App $a)
 		$diaspora_enabled = false;
 	}
 	if ($ssl_policy != intval(Config::get('system', 'ssl_policy'))) {
-		if ($ssl_policy == SSL_POLICY_FULL) {
+		if ($ssl_policy == BaseURL::SSL_POLICY_FULL) {
 			q("UPDATE `contact` SET
 				`url`     = REPLACE(`url`    , 'http:' , 'https:'),
 				`photo`   = REPLACE(`photo`  , 'http:' , 'https:'),
@@ -1217,7 +1215,7 @@ function admin_page_site_post(App $a)
 				`thumb`   = REPLACE(`thumb`  , 'http:' , 'https:')
 				WHERE 1 "
 			);
-		} elseif ($ssl_policy == SSL_POLICY_SELFSIGN) {
+		} elseif ($ssl_policy == BaseURL::SSL_POLICY_SELFSIGN) {
 			q("UPDATE `contact` SET
 				`url`     = REPLACE(`url`    , 'https:' , 'http:'),
 				`photo`   = REPLACE(`photo`  , 'https:' , 'http:'),
@@ -1473,9 +1471,9 @@ function admin_page_site(App $a)
 	];
 
 	$ssl_choices = [
-		SSL_POLICY_NONE => L10n::t("No SSL policy, links will track page SSL state"),
-		SSL_POLICY_FULL => L10n::t("Force all links to use SSL"),
-		SSL_POLICY_SELFSIGN => L10n::t("Self-signed certificate, use SSL for local links only \x28discouraged\x29")
+		BaseURL::SSL_POLICY_NONE => L10n::t("No SSL policy, links will track page SSL state"),
+		BaseURL::SSL_POLICY_FULL => L10n::t("Force all links to use SSL"),
+		BaseURL::SSL_POLICY_SELFSIGN => L10n::t("Self-signed certificate, use SSL for local links only \x28discouraged\x29")
 	];
 
 	$check_git_version_choices = [
diff --git a/src/App.php b/src/App.php
index 2576cc5d8e..3e1dc147f3 100644
--- a/src/App.php
+++ b/src/App.php
@@ -8,7 +8,6 @@ use Detection\MobileDetect;
 use DOMDocument;
 use DOMXPath;
 use Exception;
-use FastRoute\RouteCollector;
 use Friendica\Core\Config\Cache\IConfigCache;
 use Friendica\Core\Config\Configuration;
 use Friendica\Core\Hook;
@@ -16,6 +15,7 @@ use Friendica\Core\Theme;
 use Friendica\Database\DBA;
 use Friendica\Model\Profile;
 use Friendica\Network\HTTPException\InternalServerErrorException;
+use Friendica\Util\BaseURL;
 use Friendica\Util\Config\ConfigFileLoader;
 use Friendica\Util\HTTPSignature;
 use Friendica\Util\Profiler;
@@ -84,9 +84,9 @@ class App
 	private $router;
 
 	/**
-	 * @var string The App URL path
+	 * @var BaseURL
 	 */
-	private $urlPath;
+	private $baseURL;
 
 	/**
 	 * @var bool true, if the call is from the Friendica APP, otherwise false
@@ -178,6 +178,11 @@ class App
 		return $this->mode;
 	}
 
+	/**
+	 * Returns the router of the Application
+	 *
+	 * @return App\Router
+	 */
 	public function getRouter()
 	{
 		return $this->router;
@@ -220,8 +225,6 @@ class App
 	}
 
 	public $queue;
-	private $scheme;
-	private $hostname;
 
 	/**
 	 * @brief App constructor.
@@ -229,19 +232,21 @@ class App
 	 * @param Configuration    $config    The Configuration
 	 * @param App\Mode         $mode      The mode of this Friendica app
 	 * @param App\Router       $router    The router of this Friendica app
+	 * @param BaseURL          $baseURL   The full base URL of this Friendica app
 	 * @param LoggerInterface  $logger    The current app logger
 	 * @param Profiler         $profiler  The profiler of this application
 	 * @param bool             $isBackend Whether it is used for backend or frontend (Default true=backend)
 	 *
 	 * @throws Exception if the Basepath is not usable
 	 */
-	public function __construct(Configuration $config, App\Mode $mode, App\Router $router, LoggerInterface $logger, Profiler $profiler, $isBackend = true)
+	public function __construct(Configuration $config, App\Mode $mode, App\Router $router, BaseURL $baseURL, LoggerInterface $logger, Profiler $profiler, $isBackend = true)
 	{
 		BaseObject::setApp($this);
 
 		$this->config   = $config;
 		$this->mode     = $mode;
 		$this->router   = $router;
+		$this->baseURL  = $baseURL;
 		$this->profiler = $profiler;
 		$this->logger   = $logger;
 
@@ -257,26 +262,6 @@ class App
 		// This has to be quite large to deal with embedded private photos
 		ini_set('pcre.backtrack_limit', 500000);
 
-		$this->scheme = 'http';
-
-		if (!empty($_SERVER['HTTPS']) ||
-			!empty($_SERVER['HTTP_FORWARDED']) && preg_match('/proto=https/', $_SERVER['HTTP_FORWARDED']) ||
-			!empty($_SERVER['HTTP_X_FORWARDED_PROTO']) && $_SERVER['HTTP_X_FORWARDED_PROTO'] == 'https' ||
-			!empty($_SERVER['HTTP_X_FORWARDED_SSL']) && $_SERVER['HTTP_X_FORWARDED_SSL'] == 'on' ||
-			!empty($_SERVER['FRONT_END_HTTPS']) && $_SERVER['FRONT_END_HTTPS'] == 'on' ||
-			!empty($_SERVER['SERVER_PORT']) && (intval($_SERVER['SERVER_PORT']) == 443) // XXX: reasonable assumption, but isn't this hardcoding too much?
-		) {
-			$this->scheme = 'https';
-		}
-
-		if (!empty($_SERVER['SERVER_NAME'])) {
-			$this->hostname = $_SERVER['SERVER_NAME'];
-
-			if (!empty($_SERVER['SERVER_PORT']) && $_SERVER['SERVER_PORT'] != 80 && $_SERVER['SERVER_PORT'] != 443) {
-				$this->hostname .= ':' . $_SERVER['SERVER_PORT'];
-			}
-		}
-
 		set_include_path(
 			get_include_path() . PATH_SEPARATOR
 			. $this->getBasePath() . DIRECTORY_SEPARATOR . 'include' . PATH_SEPARATOR
@@ -354,8 +339,6 @@ class App
 	 */
 	public function reload()
 	{
-		$this->determineURLPath();
-
 		$this->getMode()->determine($this->getBasePath());
 
 		if ($this->getMode()->has(App\Mode::DBAVAILABLE)) {
@@ -398,97 +381,28 @@ class App
 	}
 
 	/**
-	 * Figure out if we are running at the top of a domain or in a sub-directory and adjust accordingly
+	 * Returns the scheme of the current call
+	 * @return string
+	 *
+	 * @deprecated 2019.06 - use BaseURL->getScheme() instead
 	 */
-	private function determineURLPath()
-	{
-		/*
-		 * The automatic path detection in this function is currently deactivated,
-		 * see issue https://github.com/friendica/friendica/issues/6679
-		 *
-		 * The problem is that the function seems to be confused with some url.
-		 * These then confuses the detection which changes the url path.
-		 */
-
-		/* Relative script path to the web server root
-		 * Not all of those $_SERVER properties can be present, so we do by inverse priority order
-		 */
-/*
-		$relative_script_path = '';
-		$relative_script_path = defaults($_SERVER, 'REDIRECT_URL'       , $relative_script_path);
-		$relative_script_path = defaults($_SERVER, 'REDIRECT_URI'       , $relative_script_path);
-		$relative_script_path = defaults($_SERVER, 'REDIRECT_SCRIPT_URL', $relative_script_path);
-		$relative_script_path = defaults($_SERVER, 'SCRIPT_URL'         , $relative_script_path);
-		$relative_script_path = defaults($_SERVER, 'REQUEST_URI'        , $relative_script_path);
-*/
-		$this->urlPath = $this->config->get('system', 'urlpath');
-
-		/* $relative_script_path gives /relative/path/to/friendica/module/parameter
-		 * QUERY_STRING gives pagename=module/parameter
-		 *
-		 * To get /relative/path/to/friendica we perform dirname() for as many levels as there are slashes in the QUERY_STRING
-		 */
-/*
-		if (!empty($relative_script_path)) {
-			// Module
-			if (!empty($_SERVER['QUERY_STRING'])) {
-				$path = trim(rdirname($relative_script_path, substr_count(trim($_SERVER['QUERY_STRING'], '/'), '/') + 1), '/');
-			} else {
-				// Root page
-				$path = trim($relative_script_path, '/');
-			}
-
-			if ($path && $path != $this->urlPath) {
-				$this->urlPath = $path;
-			}
-		}
-*/
-	}
-
 	public function getScheme()
 	{
-		return $this->scheme;
+		return $this->baseURL->getScheme();
 	}
 
 	/**
-	 * @brief Retrieves the Friendica instance base URL
+	 * Retrieves the Friendica instance base URL
 	 *
-	 * This function assembles the base URL from multiple parts:
-	 * - Protocol is determined either by the request or a combination of
-	 * system.ssl_policy and the $ssl parameter.
-	 * - Host name is determined either by system.hostname or inferred from request
-	 * - Path is inferred from SCRIPT_NAME
+	 * @param bool $ssl Whether to append http or https under BaseURL::SSL_POLICY_SELFSIGN
 	 *
-	 * Note: $ssl parameter value doesn't directly correlate with the resulting protocol
-	 *
-	 * @param bool $ssl Whether to append http or https under SSL_POLICY_SELFSIGN
 	 * @return string Friendica server base URL
-	 * @throws InternalServerErrorException
+	 *
+	 * @deprecated 2019.06 - use BaseURL->get($ssl) instead
 	 */
 	public function getBaseURL($ssl = false)
 	{
-		$scheme = $this->scheme;
-
-		if ($this->config->get('system', 'ssl_policy') == SSL_POLICY_FULL) {
-			$scheme = 'https';
-		}
-
-		//	Basically, we have $ssl = true on any links which can only be seen by a logged in user
-		//	(and also the login link). Anything seen by an outsider will have it turned off.
-
-		if ($this->config->get('system', 'ssl_policy') == SSL_POLICY_SELFSIGN) {
-			if ($ssl) {
-				$scheme = 'https';
-			} else {
-				$scheme = 'http';
-			}
-		}
-
-		if ($this->config->get('config', 'hostname') != '') {
-			$this->hostname = $this->config->get('config', 'hostname');
-		}
-
-		return $scheme . '://' . $this->hostname . (!empty($this->getURLPath()) ? '/' . $this->getURLPath() : '' );
+		return $this->baseURL->get($ssl);
 	}
 
 	/**
@@ -497,55 +411,36 @@ class App
 	 * Clears the baseurl cache to prevent inconsistencies
 	 *
 	 * @param string $url
-	 * @throws InternalServerErrorException
+	 *
+	 * @deprecated 2019.06 - use BaseURL->saveByURL($url) instead
 	 */
 	public function setBaseURL($url)
 	{
-		$parsed = @parse_url($url);
-		$hostname = '';
-
-		if (!empty($parsed)) {
-			if (!empty($parsed['scheme'])) {
-				$this->scheme = $parsed['scheme'];
-			}
-
-			if (!empty($parsed['host'])) {
-				$hostname = $parsed['host'];
-			}
-
-			if (!empty($parsed['port'])) {
-				$hostname .= ':' . $parsed['port'];
-			}
-			if (!empty($parsed['path'])) {
-				$this->urlPath = trim($parsed['path'], '\\/');
-			}
-
-			if (file_exists($this->getBasePath() . '/.htpreconfig.php')) {
-				include $this->getBasePath() . '/.htpreconfig.php';
-			}
-
-			if ($this->config->get('config', 'hostname') != '') {
-				$this->hostname = $this->config->get('config', 'hostname');
-			}
-
-			if (!isset($this->hostname) || ($this->hostname == '')) {
-				$this->hostname = $hostname;
-			}
-		}
+		$this->baseURL->saveByURL($url);
 	}
 
+	/**
+	 * Returns the current hostname
+	 *
+	 * @return string
+	 *
+	 * @deprecated 2019.06 - use BaseURL->getHostname() instead
+	 */
 	public function getHostName()
 	{
-		if ($this->config->get('config', 'hostname') != '') {
-			$this->hostname = $this->config->get('config', 'hostname');
-		}
-
-		return $this->hostname;
+		return $this->baseURL->getHostname();
 	}
 
+	/**
+	 * Returns the sub-path of the full URL
+	 *
+	 * @return string
+	 *
+	 * @deprecated 2019.06 - use BaseURL->getUrlPath() instead
+	 */
 	public function getURLPath()
 	{
-		return $this->urlPath;
+		return $this->baseURL->getUrlPath();
 	}
 
 	/**
@@ -1120,7 +1015,7 @@ class App
 		if (!$this->getMode()->isInstall()) {
 			// Force SSL redirection
 			if ($this->config->get('system', 'force_ssl') && ($this->getScheme() == "http")
-				&& intval($this->config->get('system', 'ssl_policy')) == SSL_POLICY_FULL
+				&& intval($this->config->get('system', 'ssl_policy')) == BaseURL::SSL_POLICY_FULL
 				&& strpos($this->getBaseURL(), 'https://') === 0
 				&& $_SERVER['REQUEST_METHOD'] == 'GET') {
 				header('HTTP/1.1 302 Moved Temporarily');
@@ -1458,7 +1353,7 @@ class App
 		header("X-Friendica-Version: " . FRIENDICA_VERSION);
 		header("Content-type: text/html; charset=utf-8");
 
-		if ($this->config->get('system', 'hsts') && ($this->config->get('system', 'ssl_policy') == SSL_POLICY_FULL)) {
+		if ($this->config->get('system', 'hsts') && ($this->config->get('system', 'ssl_policy') == BaseUrl::SSL_POLICY_FULL)) {
 			header("Strict-Transport-Security: max-age=31536000");
 		}
 
diff --git a/src/Core/Authentication.php b/src/Core/Authentication.php
index 106ba2a602..1963d34b4e 100644
--- a/src/Core/Authentication.php
+++ b/src/Core/Authentication.php
@@ -8,6 +8,7 @@ namespace Friendica\Core;
 use Friendica\BaseObject;
 use Friendica\Database\DBA;
 use Friendica\Model\User;
+use Friendica\Util\BaseURL;
 use Friendica\Util\DateTimeFormat;
 
 /**
@@ -51,7 +52,7 @@ class Authentication extends BaseObject
 			$value = "";
 		}
 
-		setcookie("Friendica", $value, $time, "/", "", (Config::get('system', 'ssl_policy') == SSL_POLICY_FULL), true);
+		setcookie("Friendica", $value, $time, "/", "", (Config::get('system', 'ssl_policy') == BaseUrl::SSL_POLICY_FULL), true);
 	}
 
 	/**
diff --git a/src/Core/Session.php b/src/Core/Session.php
index d9143c8809..f1da864bb1 100644
--- a/src/Core/Session.php
+++ b/src/Core/Session.php
@@ -7,6 +7,7 @@ namespace Friendica\Core;
 
 use Friendica\Core\Session\CacheSessionHandler;
 use Friendica\Core\Session\DatabaseSessionHandler;
+use Friendica\Util\BaseURL;
 
 /**
  * High-level Session service class
@@ -24,7 +25,7 @@ class Session
 		ini_set('session.use_only_cookies', 1);
 		ini_set('session.cookie_httponly', 1);
 
-		if (Config::get('system', 'ssl_policy') == SSL_POLICY_FULL) {
+		if (Config::get('system', 'ssl_policy') == BaseUrl::SSL_POLICY_FULL) {
 			ini_set('session.cookie_secure', 1);
 		}
 
diff --git a/src/Core/System.php b/src/Core/System.php
index 45a88fe093..83c3dc9081 100644
--- a/src/Core/System.php
+++ b/src/Core/System.php
@@ -23,7 +23,7 @@ class System extends BaseObject
 	/**
 	 * @brief Retrieves the Friendica instance base URL
 	 *
-	 * @param bool $ssl Whether to append http or https under SSL_POLICY_SELFSIGN
+	 * @param bool $ssl Whether to append http or https under BaseURL::SSL_POLICY_SELFSIGN
 	 * @return string Friendica server base URL
 	 * @throws InternalServerErrorException
 	 */
diff --git a/src/Core/Update.php b/src/Core/Update.php
index d2bbc237c7..328938fe1c 100644
--- a/src/Core/Update.php
+++ b/src/Core/Update.php
@@ -3,12 +3,8 @@
 namespace Friendica\Core;
 
 use Friendica\App;
-use Friendica\Core\Config\Cache\IConfigCache;
 use Friendica\Database\DBA;
 use Friendica\Database\DBStructure;
-use Friendica\Util\BasePath;
-use Friendica\Util\Config\ConfigFileLoader;
-use Friendica\Util\Config\ConfigFileSaver;
 use Friendica\Util\Strings;
 
 class Update
@@ -32,7 +28,7 @@ class Update
 		}
 
 		// Check if the config files are set correctly
-		self::checkConfigFile($basePath, $mode);
+		self::checkBaseSettings($_SERVER);
 
 		// Don't check the status if the last update was failed
 		if (Config::get('system', 'update', Update::SUCCESS, true) == Update::FAILED) {
@@ -229,142 +225,9 @@ class Update
 		}
 	}
 
-	/**
-	 * Checks the config settings and saves given config values into the config file
-	 *
-	 * @param string    $basePath The basepath of Friendica
-	 * @param App\Mode  $mode     The current App mode
-	 *
-	 * @return bool True, if something has been saved
-	 */
-	public static function checkConfigFile($basePath, App\Mode $mode)
-	{
-		if (empty($basePath)) {
-			$basePath = BasePath::create(dirname(__DIR__, 2));
-		}
-
-		$config = [
-			'config' => [
-				'hostname' => [
-					'allowEmpty' => false,
-					'default' => '',
-				],
-			],
-			'system' => [
-				'basepath' => [
-					'allowEmpty' => false,
-					'default' => $basePath,
-				],
-			]
-		];
-
-		$configFileLoader = new ConfigFileLoader($basePath, $mode);
-		$configCache = new Config\Cache\ConfigCache();
-		$configFileLoader->setupCache($configCache, true);
-
-		// checks if something is to update, otherwise skip this function at all
-		$missingConfig = $configCache->keyDiff($config);
-		if (empty($missingConfig)) {
-			return true;
-		}
-
-		// We just want one update process
-		if (Lock::acquire('config_update')) {
-			$configFileSaver = new ConfigFileSaver($basePath);
-
-			$updated = false;
-			$toDelete = [];
-
-			foreach ($missingConfig as $category => $keys) {
-				foreach ($keys as $key => $value) {
-					if (self::updateConfigEntry($configCache, $configFileSaver, $category, $key, $value['allowEmpty'], $value['default'])) {
-						$toDelete[] = ['cat' => $category, 'key' => $key];
-						$updated = true;
-					};
-				}
-			}
-
-			// In case there is nothing to do, skip the update
-			if (!$updated) {
-				Lock::release('config_update');
-				return true;
-			}
-
-			if (!$configFileSaver->saveToConfigFile()) {
-				Logger::alert('Config entry update failed - maybe wrong permission?');
-				Lock::release('config_update');
-				return false;
-			}
-
-			// After the successful save, remove the db values
-			foreach ($toDelete as $delete) {
-				DBA::delete('config', ['cat' => $delete['cat'], 'k' => $delete['key']]);
-			}
-
-			Lock::release('config_update');
-		}
-
-		return true;
-	}
-
-	/**
-	 * Adds a value to the ConfigFileSave in case it isn't already updated
-	 *
-	 * @param IConfigCache    $configCache     The cached config file
-	 * @param ConfigFileSaver $configFileSaver The config file saver
-	 * @param string          $cat             The config category
-	 * @param string          $key             The config key
-	 * @param bool            $allowEmpty      If true, empty values are valid (Default there has to be a variable)
-	 * @param string          $default         A default value, if none of the settings are valid
-	 *
-	 * @return boolean True, if a value was updated
-	 *
-	 * @throws \Exception if DBA or Logger doesn't work
-	 */
-	private static function updateConfigEntry(
-		IConfigCache $configCache,
-		ConfigFileSaver $configFileSaver,
-		$cat,
-		$key,
-		$allowEmpty = false,
-		$default = '')
+	public static function checkBaseSettings(array $server)
 	{
 
-		// check if the config file differs from the whole configuration (= The db contains other values)
-		$fileValue = $configCache->get($cat, $key);
-		$dbConfig  = DBA::selectFirst('config', ['v'], ['cat' => $cat, 'k' => $key]);
-
-		if (DBA::isResult($dbConfig)) {
-			$dbValue = $dbConfig['v'];
-		} else {
-			$dbValue = null;
-		}
-
-		// If the db contains a config value, check it
-		if ((
-				($allowEmpty && isset($dbValue)) ||
-				(!$allowEmpty && !empty($dbValue))
-			) &&
-			$fileValue !== $dbValue) {
-			Logger::info('Difference in config found', ['cat' => $cat, 'key' => $key, 'file' => $fileValue, 'db' => $dbValue]);
-			$configFileSaver->addConfigValue($cat, $key, $dbValue);
-			return true;
-
-		// If both config values are not set, use the default value
-		} elseif (
-			($allowEmpty && !isset($fileValue) && !isset($dbValue)) ||
-			(!$allowEmpty && empty($fileValue) && empty($dbValue) && !empty($default))) {
-
-			Logger::info('Using default for config', ['cat' => $cat, 'key' => $key, 'value' => $default]);
-			$configFileSaver->addConfigValue($cat, $key, $default);
-			return true;
-
-		// If either the file config value isn't empty or the db value is the same as the
-		// file config value, skip it
-		} else {
-			Logger::debug('No Difference in config found', ['cat' => $cat, 'key' => $key, 'value' => $fileValue, 'db' => $dbValue]);
-			return false;
-		}
 	}
 
 	/**
diff --git a/src/Factory/DependencyFactory.php b/src/Factory/DependencyFactory.php
index 0f33e095bc..e55a52d14e 100644
--- a/src/Factory/DependencyFactory.php
+++ b/src/Factory/DependencyFactory.php
@@ -5,6 +5,7 @@ namespace Friendica\Factory;
 use Friendica\App;
 use Friendica\Factory;
 use Friendica\Util\BasePath;
+use Friendica\Util\BaseURL;
 use Friendica\Util\Config;
 
 class DependencyFactory
@@ -34,7 +35,8 @@ class DependencyFactory
 		Factory\ConfigFactory::createPConfig($configCache);
 		$logger = Factory\LoggerFactory::create($channel, $config, $profiler);
 		Factory\LoggerFactory::createDev($channel, $config, $profiler);
+		$baseURL = new BaseURL($config, $_SERVER);
 
-		return new App($config, $mode, $router, $logger, $profiler, $isBackend);
+		return new App($config, $mode, $router, $baseURL, $logger, $profiler, $isBackend);
 	}
 }
diff --git a/src/Model/Contact.php b/src/Model/Contact.php
index fe373ae94a..b19783427a 100644
--- a/src/Model/Contact.php
+++ b/src/Model/Contact.php
@@ -22,6 +22,7 @@ use Friendica\Protocol\Diaspora;
 use Friendica\Protocol\OStatus;
 use Friendica\Protocol\PortableContact;
 use Friendica\Protocol\Salmon;
+use Friendica\Util\BaseURL;
 use Friendica\Util\DateTimeFormat;
 use Friendica\Util\Network;
 use Friendica\Util\Strings;
@@ -1938,7 +1939,7 @@ class Contact extends BaseObject
 	public static function updateSslPolicy(array $contact, $new_policy)
 	{
 		$ssl_changed = false;
-		if ((intval($new_policy) == SSL_POLICY_SELFSIGN || $new_policy === 'self') && strstr($contact['url'], 'https:')) {
+		if ((intval($new_policy) == BaseURL::SSL_POLICY_SELFSIGN || $new_policy === 'self') && strstr($contact['url'], 'https:')) {
 			$ssl_changed = true;
 			$contact['url']     = 	str_replace('https:', 'http:', $contact['url']);
 			$contact['request'] = 	str_replace('https:', 'http:', $contact['request']);
@@ -1948,7 +1949,7 @@ class Contact extends BaseObject
 			$contact['poco']    = 	str_replace('https:', 'http:', $contact['poco']);
 		}
 
-		if ((intval($new_policy) == SSL_POLICY_FULL || $new_policy === 'full') && strstr($contact['url'], 'http:')) {
+		if ((intval($new_policy) == BaseURL::SSL_POLICY_FULL || $new_policy === 'full') && strstr($contact['url'], 'http:')) {
 			$ssl_changed = true;
 			$contact['url']     = 	str_replace('http:', 'https:', $contact['url']);
 			$contact['request'] = 	str_replace('http:', 'https:', $contact['request']);
diff --git a/src/Network/Probe.php b/src/Network/Probe.php
index 008106ec3f..b0d2630103 100644
--- a/src/Network/Probe.php
+++ b/src/Network/Probe.php
@@ -10,6 +10,7 @@ namespace Friendica\Network;
  */
 
 use DOMDocument;
+use DomXPath;
 use Friendica\Core\Cache;
 use Friendica\Core\Config;
 use Friendica\Core\Logger;
@@ -18,15 +19,14 @@ use Friendica\Core\System;
 use Friendica\Database\DBA;
 use Friendica\Model\Contact;
 use Friendica\Model\Profile;
+use Friendica\Protocol\ActivityPub;
 use Friendica\Protocol\Email;
 use Friendica\Protocol\Feed;
-use Friendica\Protocol\ActivityPub;
 use Friendica\Util\Crypto;
 use Friendica\Util\DateTimeFormat;
 use Friendica\Util\Network;
 use Friendica\Util\Strings;
 use Friendica\Util\XML;
-use DomXPath;
 
 /**
  * @brief This class contain functions for probing URL
@@ -510,30 +510,6 @@ class Probe
 		return $data;
 	}
 
-	/**
-	 * @brief Switch the scheme of an url between http and https
-	 *
-	 * @param string $url URL
-	 *
-	 * @return string switched URL
-	 */
-	private static function switchScheme($url)
-	{
-		$parts = parse_url($url);
-
-		if (!isset($parts['scheme'])) {
-			return $url;
-		}
-
-		if ($parts['scheme'] == 'http') {
-			$url = str_replace('http://', 'https://', $url);
-		} elseif ($parts['scheme'] == 'https') {
-			$url = str_replace('https://', 'http://', $url);
-		}
-
-		return $url;
-	}
-
 	/**
 	 * @brief Checks if a profile url should be OStatus but only provides partial information
 	 *
@@ -566,7 +542,7 @@ class Probe
 			return $webfinger;
 		}
 
-		$url = self::switchScheme($webfinger['subject']);
+		$url = Network::switchScheme($webfinger['subject']);
 		$path = str_replace('{uri}', urlencode($url), $lrdd);
 		$webfinger2 = self::webfinger($path, $type);
 
diff --git a/src/Protocol/DFRN.php b/src/Protocol/DFRN.php
index 8433801812..b6252655ac 100644
--- a/src/Protocol/DFRN.php
+++ b/src/Protocol/DFRN.php
@@ -29,6 +29,7 @@ use Friendica\Model\PermissionSet;
 use Friendica\Model\Profile;
 use Friendica\Model\User;
 use Friendica\Object\Image;
+use Friendica\Util\BaseURL;
 use Friendica\Util\Crypto;
 use Friendica\Util\DateTimeFormat;
 use Friendica\Util\Network;
@@ -1208,13 +1209,13 @@ class DFRN
 		$ssl_val = intval(Config::get('system', 'ssl_policy'));
 
 		switch ($ssl_val) {
-			case SSL_POLICY_FULL:
+			case BaseURL::SSL_POLICY_FULL:
 				$ssl_policy = 'full';
 				break;
-			case SSL_POLICY_SELFSIGN:
+			case BaseURL::SSL_POLICY_SELFSIGN:
 				$ssl_policy = 'self';
 				break;
-			case SSL_POLICY_NONE:
+			case BaseURL::SSL_POLICY_NONE:
 			default:
 				$ssl_policy = 'none';
 				break;
diff --git a/src/Util/BaseURL.php b/src/Util/BaseURL.php
new file mode 100644
index 0000000000..a9bed2b5e8
--- /dev/null
+++ b/src/Util/BaseURL.php
@@ -0,0 +1,344 @@
+<?php
+
+namespace Friendica\Util;
+
+use Friendica\Core\Config\Configuration;
+
+/**
+ * A class which checks and contains the basic
+ * environment for the BaseURL (url, urlpath, ssl_policy, hostname)
+ */
+class BaseURL
+{
+	/**
+	 * No SSL necessary
+	 */
+	const SSL_POLICY_NONE = 0;
+
+	/**
+	 * SSL is necessary
+	 */
+	const SSL_POLICY_FULL = 1;
+
+	/**
+	 * SSL is optional, but preferred
+	 */
+	const SSL_POLICY_SELFSIGN = 2;
+
+	/**
+	 * The Friendica Config
+	 * @var Configuration
+	 */
+	private $config;
+
+	/**
+	 * The server side variables
+	 * @var array
+	 */
+	private $server;
+
+	/**
+	 * The hostname of the Base URL
+	 * @var string
+	 */
+	private $hostname;
+
+	/**
+	 * The SSL_POLICY of the Base URL
+	 * @var int
+	 */
+	private $sslPolicy;
+
+	/**
+	 * The URL sub-path of the Base URL
+	 * @var string
+	 */
+	private $urlPath;
+
+	/**
+	 * The full URL
+	 * @var string
+	 */
+	private $url;
+
+	/**
+	 * The current scheme of this call
+	 * @var string
+	 */
+	private $scheme;
+
+	/**
+	 * Returns the hostname of this node
+	 * @return string
+	 */
+	public function getHostname()
+	{
+		return $this->hostname;
+	}
+
+	/**
+	 * Returns the current scheme of this call
+	 * @return string
+	 */
+	public function getScheme()
+	{
+		return $this->scheme;
+	}
+
+	/**
+	 * Returns the SSL policy of this node
+	 * @return int
+	 */
+	public function getSSLPolicy()
+	{
+		return $this->sslPolicy;
+	}
+
+	/**
+	 * Returns the sub-path of this URL
+	 * @return string
+	 */
+	public function getUrlPath()
+	{
+		return $this->urlPath;
+	}
+
+	/**
+	 * Returns the full URL of this call
+	 *
+	 * Note: $ssl parameter value doesn't directly correlate with the resulting protocol
+	 *
+	 * @param bool $ssl True, if ssl should get used
+	 *
+	 * @return string
+	 */
+	public function get($ssl = false)
+	{
+		return (!$ssl ? $this->url : $this->returnBaseURL($ssl));
+	}
+
+	/**
+	 * Save current parts of the base Url
+	 *
+	 * @param string? $hostname
+	 * @param int?    $sslPolicy
+	 * @param string? $urlPath
+	 *
+	 * @return bool true, if successful
+	 */
+	public function save($hostname = null, $sslPolicy = null, $urlPath = null)
+	{
+		$success = true;
+
+		if (!empty($hostname)) {
+			$this->hostname  = $hostname;
+			if (!$this->config->set('config', 'hostname', $this->hostname)) {
+				$success = false;
+			}
+		}
+
+		if (isset($sslPolicy)) {
+			$this->sslPolicy = $sslPolicy;
+			if (!$this->config->set('system', 'ssl_policy', $this->sslPolicy)) {
+				$success = false;
+			}
+		}
+
+		if (isset($urlPath)) {
+			$this->urlPath   = $urlPath;
+			if (!$this->config->set('system', 'urlpath', $this->urlPath)) {
+				$success = false;
+			}
+		}
+
+		$this->determineBaseUrl();
+		if (!$this->config->set('system', 'url', $this->url)) {
+			$success = false;
+		}
+
+		return $success;
+	}
+
+	/**
+	 * Save the current url as base URL
+	 *
+	 * @param $url
+	 *
+	 * @return bool true, if the save was successful
+	 */
+	public function saveByURL($url)
+	{
+		$parsed = @parse_url($url);
+
+		if (empty($parsed)) {
+			return false;
+		}
+
+		$hostname = $parsed['host'];
+		if (!empty($hostname) && !empty($parsed['port'])) {
+			$hostname .= ':' . $parsed['port'];
+		}
+
+		$urlPath = null;
+		if (!empty($parsed['path'])) {
+			$urlPath = trim($parsed['path'], '\\/');
+		}
+
+		return $this->save($hostname, null, $urlPath);
+	}
+
+	/**
+	 * @param Configuration $config The Friendica configuration
+	 * @param array         $server The $_SERVER array
+	 */
+	public function __construct(Configuration $config, array $server)
+	{
+		$this->config = $config;
+		$this->server = $server;
+
+		$this->checkConfig();
+		$this->determineSchema();
+	}
+
+	/**
+	 * Check the current config during loading
+	 */
+	public function checkConfig()
+	{
+		$this->hostname  = $this->config->get('config', 'hostname', null);
+		$this->urlPath   = $this->config->get('system', 'urlpath', null);
+		$this->sslPolicy = $this->config->get('system', 'ssl_policy', null);
+		$this->url       = $this->config->get('system', 'url', null);
+
+		if (empty($this->hostname)) {
+			$this->determineHostname();
+
+			if (!empty($this->hostname)) {
+				$this->config->set('config', 'hostname', $this->hostname);
+			}
+		}
+
+		if (!isset($this->urlPath)) {
+			$this->determineURLPath();
+			$this->config->set('system', 'urlpath', $this->urlPath);
+		}
+
+		if (!isset($this->sslPolicy)) {
+			$this->sslPolicy = self::SSL_POLICY_NONE;
+			$this->config->set('system', 'ssl_policy', $this->sslPolicy);
+		}
+
+		if (empty($this->url)) {
+			$this->determineBaseUrl();
+
+			if (!empty($url)) {
+				$this->config->set('system', 'url', $this->url);
+			}
+		}
+	}
+
+	/**
+	 * Determines the hostname of this node if not set already
+	 */
+	private function determineHostname()
+	{
+		$this->hostname = '';
+
+		if (!empty($this->server['SERVER_NAME'])) {
+			$this->hostname = $this->server['SERVER_NAME'];
+
+			if (!empty($this->server['SERVER_PORT']) && $this->server['SERVER_PORT'] != 80 && $this->server['SERVER_PORT'] != 443) {
+				$this->hostname .= ':' . $this->server['SERVER_PORT'];
+			}
+		}
+	}
+
+	/**
+	 * Figure out if we are running at the top of a domain or in a sub-directory
+	 */
+	private function determineURLPath()
+	{
+		$this->urlPath = '';
+
+		/*
+		 * The automatic path detection in this function is currently deactivated,
+		 * see issue https://github.com/friendica/friendica/issues/6679
+		 *
+		 * The problem is that the function seems to be confused with some url.
+		 * These then confuses the detection which changes the url path.
+		 */
+
+		/* Relative script path to the web server root
+		 * Not all of those $_SERVER properties can be present, so we do by inverse priority order
+		 */
+		$relative_script_path = '';
+		$relative_script_path = defaults($this->server, 'REDIRECT_URL', $relative_script_path);
+		$relative_script_path = defaults($this->server, 'REDIRECT_URI', $relative_script_path);
+		$relative_script_path = defaults($this->server, 'REDIRECT_SCRIPT_URL', $relative_script_path);
+		$relative_script_path = defaults($this->server, 'SCRIPT_URL', $relative_script_path);
+		$relative_script_path = defaults($this->server, 'REQUEST_URI', $relative_script_path);
+
+		/* $relative_script_path gives /relative/path/to/friendica/module/parameter
+		 * QUERY_STRING gives pagename=module/parameter
+		 *
+		 * To get /relative/path/to/friendica we perform dirname() for as many levels as there are slashes in the QUERY_STRING
+		 */
+		if (!empty($relative_script_path)) {
+			// Module
+			if (!empty($this->server['QUERY_STRING'])) {
+				$this->urlPath = trim(rdirname($relative_script_path, substr_count(trim($this->server['QUERY_STRING'], '/'), '/') + 1), '/');
+			} else {
+				// Root page
+				$this->urlPath = trim($relative_script_path, '/');
+			}
+		}
+	}
+
+	/**
+	 * Determine the full URL based on all parts
+	 */
+	private function determineBaseUrl()
+	{
+		$scheme = 'http';
+
+		if ($this->sslPolicy == self::SSL_POLICY_FULL) {
+			$scheme = 'https';
+		}
+
+		$this->url = $scheme . '://' . $this->hostname . (!empty($this->urlPath) ? '/' . $this->urlPath : '' );
+	}
+
+	/**
+	 * Determine the scheme of the current used link
+	 */
+	private function determineSchema()
+	{
+		$this->scheme = 'http';
+
+		if (!empty($this->server['HTTPS']) ||
+			!empty($this->server['HTTP_FORWARDED']) && preg_match('/proto=https/', $this->server['HTTP_FORWARDED']) ||
+			!empty($this->server['HTTP_X_FORWARDED_PROTO']) && $this->server['HTTP_X_FORWARDED_PROTO'] == 'https' ||
+			!empty($this->server['HTTP_X_FORWARDED_SSL']) && $this->server['HTTP_X_FORWARDED_SSL'] == 'on' ||
+			!empty($this->server['FRONT_END_HTTPS']) && $this->server['FRONT_END_HTTPS'] == 'on' ||
+			!empty($this->server['SERVER_PORT']) && (intval($this->server['SERVER_PORT']) == 443) // XXX: reasonable assumption, but isn't this hardcoding too much?
+		) {
+			$this->scheme = 'https';
+		}
+	}
+
+	/**
+	 * Returns the URL based on the current used ssl setting
+	 *
+	 * @param bool $ssl true, if ssl should be used
+	 *
+	 * @return string
+	 */
+	private function returnBaseURL($ssl)
+	{
+		if ($this->sslPolicy == self::SSL_POLICY_SELFSIGN && $ssl) {
+			return Network::switchScheme($this->url);
+		}
+
+		return $this->url;
+	}
+}
diff --git a/src/Util/Config/ConfigFileSaver.php b/src/Util/Config/ConfigFileSaver.php
deleted file mode 100644
index e32e11a4d5..0000000000
--- a/src/Util/Config/ConfigFileSaver.php
+++ /dev/null
@@ -1,341 +0,0 @@
-<?php
-
-namespace Friendica\Util\Config;
-
-/**
- * The ConfigFileSaver saves specific variables into the config-files
- *
- * It is capable of loading the following config files:
- * - *.config.php   (current)
- * - *.ini.php      (deprecated)
- * - *.htconfig.php (deprecated)
- */
-class ConfigFileSaver extends ConfigFileManager
-{
-	/**
-	 * The standard indentation for config files
-	 * @var string
-	 */
-	const INDENT = "\t";
-
-	/**
-	 * The settings array to save to
-	 * @var array
-	 */
-	private $settings = [];
-
-	/**
-	 * Adds a given value to the config file
-	 * Either it replaces the current value or it will get added
-	 *
-	 * @param string $cat   The configuration category
-	 * @param string $key   The configuration key
-	 * @param string $value The new value
-	 */
-	public function addConfigValue($cat, $key, $value)
-	{
-		$settingsCount = count(array_keys($this->settings));
-
-		for ($i = 0; $i < $settingsCount; $i++) {
-			// if already set, overwrite the value
-			if ($this->settings[$i]['cat'] === $cat &&
-				$this->settings[$i]['key'] === $key) {
-				$this->settings[$i] = ['cat' => $cat, 'key' => $key, 'value' => $value];
-				return;
-			}
-		}
-
-		$this->settings[] = ['cat' => $cat, 'key' => $key, 'value' => $value];
-	}
-
-	/**
-	 * Resetting all added configuration entries so far
-	 */
-	public function reset()
-	{
-		$this->settings = [];
-	}
-
-	/**
-	 * Save all added configuration entries to the given config files
-	 * After updating the config entries, all configuration entries will be reseted
-	 *
-	 * @param string $name The name of the configuration file (default is empty, which means the default name each type)
-	 *
-	 * @return bool true, if at least one configuration file was successfully updated or nothing to do
-	 */
-	public function saveToConfigFile($name = '')
-	{
-		// If no settings et, return true
-		if (count(array_keys($this->settings)) === 0) {
-			return true;
-		}
-
-		$saved = false;
-
-		// Check for the *.config.php file inside the /config/ path
-		list($reading, $writing) = $this->openFile($this->getConfigFullName($name));
-		if (isset($reading) && isset($writing)) {
-			$this->saveConfigFile($reading, $writing);
-			// Close the current file handler and rename them
-			if ($this->closeFile($this->getConfigFullName($name), $reading, $writing)) {
-				// just return true, if everything went fine
-				$saved = true;
-			}
-		}
-
-		// Check for the *.ini.php file inside the /config/ path
-		list($reading, $writing) = $this->openFile($this->getIniFullName($name));
-		if (isset($reading) && isset($writing)) {
-			$this->saveINIConfigFile($reading, $writing);
-			// Close the current file handler and rename them
-			if ($this->closeFile($this->getIniFullName($name), $reading, $writing)) {
-				// just return true, if everything went fine
-				$saved = true;
-			}
-		}
-
-		// Check for the *.php file (normally .htconfig.php) inside the / path
-		list($reading, $writing) = $this->openFile($this->getHtConfigFullName($name));
-		if (isset($reading) && isset($writing)) {
-			$this->saveToLegacyConfig($reading, $writing);
-			// Close the current file handler and rename them
-			if ($this->closeFile($this->getHtConfigFullName($name), $reading, $writing)) {
-				// just return true, if everything went fine
-				$saved = true;
-			}
-		}
-
-		$this->reset();
-
-		return $saved;
-	}
-
-	/**
-	 * Opens a config file and returns two handler for reading and writing
-	 *
-	 * @param string $fullName The full name of the current config
-	 *
-	 * @return array An array containing the two reading and writing handler
-	 */
-	private function openFile($fullName)
-	{
-		if (empty($fullName)) {
-			return [null, null];
-		}
-
-		try {
-			$reading = fopen($fullName, 'r');
-		} catch (\Exception $exception) {
-			return [null, null];
-		}
-
-		if (!$reading) {
-			return [null, null];
-		}
-
-		try {
-			$writing = fopen($fullName . '.tmp', 'w');
-		} catch (\Exception $exception) {
-			fclose($reading);
-			return [null, null];
-		}
-
-		if (!$writing) {
-			fclose($reading);
-			return [null, null];
-		}
-
-		return [$reading, $writing];
-	}
-
-	/**
-	 * Close and rename the config file
-	 *
-	 * @param string   $fullName The full name of the current config
-	 * @param resource $reading  The reading resource handler
-	 * @param resource $writing  The writing resource handler
-	 *
-	 * @return bool True, if the close was successful
-	 */
-	private function closeFile($fullName, $reading, $writing)
-	{
-		fclose($reading);
-		fclose($writing);
-
-		try {
-			$renamed = rename($fullName, $fullName . '.old');
-		} catch (\Exception $exception) {
-			return false;
-		}
-
-		if (!$renamed) {
-			return false;
-		}
-
-		try {
-			$renamed = rename($fullName . '.tmp', $fullName);
-		} catch (\Exception $exception) {
-			// revert the move of the current config file to have at least the old config
-			rename($fullName . '.old', $fullName);
-			return false;
-		}
-
-		if (!$renamed) {
-			// revert the move of the current config file to have at least the old config
-			rename($fullName . '.old', $fullName);
-			return false;
-		}
-
-		return true;
-	}
-
-	/**
-	 * Saves all configuration values to a config file
-	 *
-	 * @param resource $reading The reading handler
-	 * @param resource $writing The writing handler
-	 */
-	private function saveConfigFile($reading, $writing)
-	{
-		$settingsCount = count(array_keys($this->settings));
-		$categoryFound = array_fill(0, $settingsCount, false);
-		$categoryBracketFound = array_fill(0, $settingsCount, false);;
-		$lineFound = array_fill(0, $settingsCount, false);;
-		$lineArrowFound = array_fill(0, $settingsCount, false);;
-
-		while (!feof($reading)) {
-
-			$line = fgets($reading);
-
-			// check for each added setting if we have to replace a config line
-			for ($i = 0; $i < $settingsCount; $i++) {
-
-				// find the first line like "'system' =>"
-				if (!$categoryFound[$i] && stristr($line, sprintf('\'%s\'', $this->settings[$i]['cat']))) {
-					$categoryFound[$i] = true;
-				}
-
-				// find the first line with a starting bracket ( "[" )
-				if ($categoryFound[$i] && !$categoryBracketFound[$i] && stristr($line, '[')) {
-					$categoryBracketFound[$i] = true;
-				}
-
-				// find the first line with the key like "'value'"
-				if ($categoryBracketFound[$i] && !$lineFound[$i] && stristr($line, sprintf('\'%s\'', $this->settings[$i]['key']))) {
-					$lineFound[$i] = true;
-				}
-
-				// find the first line with an arrow ("=>") after finding the key
-				if ($lineFound[$i] && !$lineArrowFound[$i] && stristr($line, '=>')) {
-					$lineArrowFound[$i] = true;
-				}
-
-				// find the current value and replace it
-				if ($lineArrowFound[$i] && preg_match_all('/\'(.*?)\'/', $line, $matches, PREG_SET_ORDER)) {
-					$lineVal = end($matches)[0];
-					$line = str_replace($lineVal, '\'' . $this->settings[$i]['value'] . '\'', $line);
-					$categoryFound[$i] = false;
-					$categoryBracketFound[$i] = false;
-					$lineFound[$i] = false;
-					$lineArrowFound[$i] = false;
-					// if a line contains a closing bracket for the category ( "]" ) and we didn't find the key/value pair,
-					// add it as a new line before the closing bracket
-				} elseif ($categoryBracketFound[$i] && !$lineArrowFound[$i] && stristr($line, ']')) {
-					$categoryFound[$i] = false;
-					$categoryBracketFound[$i] = false;
-					$lineFound[$i] = false;
-					$lineArrowFound[$i] = false;
-					$newLine = sprintf(self::INDENT . self::INDENT . '\'%s\' => \'%s\',' . PHP_EOL, $this->settings[$i]['key'], $this->settings[$i]['value']);
-					$line = $newLine . $line;
-				}
-			}
-
-			fputs($writing, $line);
-		}
-	}
-
-	/**
-	 * Saves a value to a ini file
-	 *
-	 * @param resource $reading The reading handler
-	 * @param resource $writing The writing handler
-	 */
-	private function saveINIConfigFile($reading, $writing)
-	{
-		$settingsCount = count(array_keys($this->settings));
-		$categoryFound = array_fill(0, $settingsCount, false);
-
-		while (!feof($reading)) {
-
-			$line = fgets($reading);
-
-			// check for each added setting if we have to replace a config line
-			for ($i = 0; $i < $settingsCount; $i++) {
-
-				// find the category of the current setting
-				if (!$categoryFound[$i] && stristr($line, sprintf('[%s]', $this->settings[$i]['cat']))) {
-					$categoryFound[$i] = true;
-
-				// check the current value
-				} elseif ($categoryFound[$i] && preg_match_all('/^' . $this->settings[$i]['key'] . '\s*=\s*(.*?)$/', $line, $matches, PREG_SET_ORDER)) {
-					$line = $this->settings[$i]['key'] . ' = ' . $this->settings[$i]['value'] . PHP_EOL;
-					$categoryFound[$i] = false;
-
-				// If end of INI file, add the line before the INI end
-				} elseif ($categoryFound[$i] && (preg_match_all('/^\[.*?\]$/', $line) || preg_match_all('/^INI;.*$/', $line))) {
-					$categoryFound[$i] = false;
-					$newLine = $this->settings[$i]['key'] . ' = ' . $this->settings[$i]['value'] . PHP_EOL;
-					$line = $newLine . $line;
-				}
-			}
-
-			fputs($writing, $line);
-		}
-	}
-
-	/**
-	 * Saves a value to a .php file (normally .htconfig.php)
-	 *
-	 * @param resource $reading The reading handler
-	 * @param resource $writing The writing handler
-	 */
-	private function saveToLegacyConfig($reading, $writing)
-	{
-		$settingsCount = count(array_keys($this->settings));
-		$found  = array_fill(0, $settingsCount, false);
-		while (!feof($reading)) {
-
-			$line = fgets($reading);
-
-			// check for each added setting if we have to replace a config line
-			for ($i = 0; $i < $settingsCount; $i++) {
-
-				// check for a non plain config setting (use category too)
-				if ($this->settings[$i]['cat'] !== 'config' && preg_match_all('/^\$a\-\>config\[\'' . $this->settings[$i]['cat'] . '\'\]\[\'' . $this->settings[$i]['key'] . '\'\]\s*=\s\'*(.*?)\';$/', $line, $matches, PREG_SET_ORDER)) {
-					$line = '$a->config[\'' . $this->settings[$i]['cat'] . '\'][\'' . $this->settings[$i]['key'] . '\'] = \'' . $this->settings[$i]['value'] . '\';' . PHP_EOL;
-					$found[$i] = true;
-
-				// check for a plain config setting (don't use a category)
-				} elseif ($this->settings[$i]['cat'] === 'config' && preg_match_all('/^\$a\-\>config\[\'' . $this->settings[$i]['key'] . '\'\]\s*=\s\'*(.*?)\';$/', $line, $matches, PREG_SET_ORDER)) {
-					$line = '$a->config[\'' . $this->settings[$i]['key'] . '\'] = \'' . $this->settings[$i]['value'] . '\';' . PHP_EOL;
-					$found[$i] = true;
-				}
-			}
-
-			fputs($writing, $line);
-		}
-
-		for ($i = 0; $i < $settingsCount; $i++) {
-			if (!$found[$i]) {
-				if ($this->settings[$i]['cat'] !== 'config') {
-					$line = '$a->config[\'' . $this->settings[$i]['cat'] . '\'][\'' . $this->settings[$i]['key'] . '\'] = \'' . $this->settings[$i]['value'] . '\';' . PHP_EOL;
-				} else {
-					$line = '$a->config[\'' . $this->settings[$i]['key'] . '\'] = \'' . $this->settings[$i]['value'] . '\';' . PHP_EOL;
-				}
-
-				fputs($writing, $line);
-			}
-		}
-	}
-}
diff --git a/src/Util/Network.php b/src/Util/Network.php
index 35744647e3..b534a5505b 100644
--- a/src/Util/Network.php
+++ b/src/Util/Network.php
@@ -835,4 +835,26 @@ class Network
 			(strlen($query) ? "?".$query : '') .
 			(strlen($fragment) ? "#".$fragment : '');
 	}
+
+
+	/**
+	 * @brief Switch the scheme of an url between http and https
+	 *
+	 * @param string $url URL
+	 *
+	 * @return string switched URL
+	 */
+	public static function switchScheme($url)
+	{
+		$parts = parse_url($url, PHP_URL_SCHEME);
+		if (!isset($parts['scheme'])) {
+			return $url;
+		}
+		if ($parts['scheme'] == 'http') {
+			$url = str_replace('http://', 'https://', $url);
+		} elseif ($parts['scheme'] == 'https') {
+			$url = str_replace('https://', 'http://', $url);
+		}
+		return $url;
+	}
 }
diff --git a/tests/src/Util/Config/ConfigFileSaverTest.php b/tests/src/Util/Config/ConfigFileSaverTest.php
deleted file mode 100644
index 04adf6014a..0000000000
--- a/tests/src/Util/Config/ConfigFileSaverTest.php
+++ /dev/null
@@ -1,189 +0,0 @@
-<?php
-
-namespace Friendica\Test\src\Util\Config;
-
-use Friendica\App;
-use Friendica\Core\Config\Cache\ConfigCache;
-use Friendica\Test\MockedTest;
-use Friendica\Test\Util\VFSTrait;
-use Friendica\Util\Config\ConfigFileLoader;
-use Friendica\Util\Config\ConfigFileSaver;
-use Mockery\MockInterface;
-use org\bovigo\vfs\vfsStream;
-
-class ConfigFileSaverTest extends MockedTest
-{
-	use VFSTrait;
-
-	/**
-	 * @var App\Mode|MockInterface
-	 */
-	private $mode;
-
-	protected function setUp()
-	{
-		parent::setUp();
-		$this->setUpVfsDir();
-		$this->mode = \Mockery::mock(App\Mode::class);
-		$this->mode->shouldReceive('isInstall')->andReturn(true);
-	}
-
-	public function dataConfigFiles()
-	{
-		return [
-			'config' => [
-				'fileName' => 'local.config.php',
-				'filePath' => dirname(__DIR__) . DIRECTORY_SEPARATOR .
-					'..' . DIRECTORY_SEPARATOR .
-					'..' . DIRECTORY_SEPARATOR .
-					'datasets' . DIRECTORY_SEPARATOR .
-					'config',
-				'relativePath' => 'config',
-			],
-			'ini' => [
-				'fileName' => 'local.ini.php',
-				'filePath' => dirname(__DIR__) . DIRECTORY_SEPARATOR .
-					'..' . DIRECTORY_SEPARATOR .
-					'..' . DIRECTORY_SEPARATOR .
-					'datasets' . DIRECTORY_SEPARATOR .
-					'config',
-				'relativePath' => 'config',
-			],
-			'htconfig' => [
-				'fileName' => '.htconfig.php',
-				'filePath' => dirname(__DIR__) . DIRECTORY_SEPARATOR .
-					'..' . DIRECTORY_SEPARATOR .
-					'..' . DIRECTORY_SEPARATOR .
-					'datasets' . DIRECTORY_SEPARATOR .
-					'config',
-				'relativePath' => '',
-			],
-		];
-	}
-
-	/**
-	 * Test the saveToConfigFile() method
-	 * @dataProvider dataConfigFiles
-	 *
-	 * @todo 20190324 [nupplaphil] for ini-configs, it isn't possible to use $ or ! inside values
-	 */
-	public function testSaveToConfig($fileName, $filePath, $relativePath)
-	{
-		$this->delConfigFile('local.config.php');
-
-		if (empty($relativePath)) {
-			$root = $this->root;
-			$relativeFullName = $fileName;
-		} else {
-			$root = $this->root->getChild($relativePath);
-			$relativeFullName = $relativePath . DIRECTORY_SEPARATOR . $fileName;
-		}
-
-		vfsStream::newFile($fileName)
-			->at($root)
-			->setContent(file_get_contents($filePath . DIRECTORY_SEPARATOR . $fileName));
-
-		$configFileSaver = new ConfigFileSaver($this->root->url());
-		$configFileLoader = new ConfigFileLoader($this->root->url(), $this->mode);
-		$configCache = new ConfigCache();
-		$configFileLoader->setupCache($configCache);
-
-		$this->assertEquals('admin@test.it', $configCache->get('config', 'admin_email'));
-		$this->assertEquals('frio', $configCache->get('system', 'theme'));
-		$this->assertNull($configCache->get('config', 'test_val'));
-		$this->assertNull($configCache->get('system', 'test_val2'));
-
-		// update values (system and config value)
-		$configFileSaver->addConfigValue('config', 'admin_email', 'new@mail.it');
-		$configFileSaver->addConfigValue('system', 'theme', 'vier');
-
-		// insert values (system and config value)
-		$configFileSaver->addConfigValue('config', 'test_val', 'Testingwith@all.we can');
-		$configFileSaver->addConfigValue('system', 'test_val2', 'TestIt First');
-
-		// overwrite value
-		$configFileSaver->addConfigValue('system', 'test_val2', 'TestIt Now');
-
-		// save it
-		$this->assertTrue($configFileSaver->saveToConfigFile());
-
-		$newConfigCache = new ConfigCache();
-		$configFileLoader->setupCache($newConfigCache);
-
-		$this->assertEquals('new@mail.it', $newConfigCache->get('config', 'admin_email'));
-		$this->assertEquals('Testingwith@all.we can', $newConfigCache->get('config', 'test_val'));
-		$this->assertEquals('vier', $newConfigCache->get('system', 'theme'));
-		$this->assertEquals('TestIt Now', $newConfigCache->get('system', 'test_val2'));
-
-		$this->assertTrue($this->root->hasChild($relativeFullName));
-		$this->assertTrue($this->root->hasChild($relativeFullName . '.old'));
-		$this->assertFalse($this->root->hasChild($relativeFullName . '.tmp'));
-
-		$this->assertEquals(file_get_contents($filePath . DIRECTORY_SEPARATOR . $fileName), file_get_contents($this->root->getChild($relativeFullName . '.old')->url()));
-	}
-
-	/**
-	 * Test the saveToConfigFile() method without permissions
-	 * @dataProvider dataConfigFiles
-	 */
-	public function testNoPermission($fileName, $filePath, $relativePath)
-	{
-		$this->delConfigFile('local.config.php');
-
-		if (empty($relativePath)) {
-			$root = $this->root;
-			$relativeFullName = $fileName;
-		} else {
-			$root = $this->root->getChild($relativePath);
-			$relativeFullName = $relativePath . DIRECTORY_SEPARATOR . $fileName;
-		}
-
-		$root->chmod(000);
-
-		vfsStream::newFile($fileName)
-			->at($root)
-			->setContent(file_get_contents($filePath . DIRECTORY_SEPARATOR . $fileName));
-
-		$configFileSaver = new ConfigFileSaver($this->root->url());
-
-		$configFileSaver->addConfigValue('system', 'test_val2', 'TestIt Now');
-
-		// wrong mod, so return false if nothing to write
-		$this->assertFalse($configFileSaver->saveToConfigFile());
-	}
-
-	/**
-	 * Test the saveToConfigFile() method with nothing to do
-	 * @dataProvider dataConfigFiles
-	 */
-	public function testNothingToDo($fileName, $filePath, $relativePath)
-	{
-		$this->delConfigFile('local.config.php');
-
-		if (empty($relativePath)) {
-			$root = $this->root;
-			$relativeFullName = $fileName;
-		} else {
-			$root = $this->root->getChild($relativePath);
-			$relativeFullName = $relativePath . DIRECTORY_SEPARATOR . $fileName;
-		}
-
-		vfsStream::newFile($fileName)
-			->at($root)
-			->setContent(file_get_contents($filePath . DIRECTORY_SEPARATOR . $fileName));
-
-		$configFileSaver = new ConfigFileSaver($this->root->url());
-		$configFileLoader = new ConfigFileLoader($this->root->url(), $this->mode);
-		$configCache = new ConfigCache();
-		$configFileLoader->setupCache($configCache);
-
-		// save nothing
-		$this->assertTrue($configFileSaver->saveToConfigFile());
-
-		$this->assertTrue($this->root->hasChild($relativeFullName));
-		$this->assertFalse($this->root->hasChild($relativeFullName . '.old'));
-		$this->assertFalse($this->root->hasChild($relativeFullName . '.tmp'));
-
-		$this->assertEquals(file_get_contents($filePath . DIRECTORY_SEPARATOR . $fileName), file_get_contents($this->root->getChild($relativeFullName)->url()));
-	}
-}