Move App to src

- Add `use Friendica\App;` wherever needed

util/db_update.php

@@ -3,6 +3,8 @@
 * @package util
 */
 
+use Friendica\App;
+
 /*
 * require boot.php
 */

util/maintenance.php

@@ -1,5 +1,6 @@
 <?php
 
+use Friendica\App;
 use Friendica\Core\Config;
 
 require_once("boot.php");

util/php2po.php

@@ -7,6 +7,7 @@
  * Output to <path/to/messages.po>
  */
 
+use Friendica\App;
 
 DEFINE("NORM_REGEXP", "|[\\\]|");
 

util/typo.php

@@ -3,6 +3,7 @@
 // Run this from cmdline in basedir and quickly see if we've
 // got any parse errors in our application files.
 
+use Friendica\App;
 
 error_reporting(E_ERROR | E_WARNING | E_PARSE );
 ini_set('display_errors', '1');