Apply suggestions from code review

Co-authored-by: Hypolite Petovan <hypolite@mrpetovan.com>

src/App.php

@@ -339,7 +339,6 @@ class App
 			set_time_limit((int)$this->config->get('system', 'ini_max_execution_time'));
 		}
 
-		// This has to be quite large to deal with embedded private photos
 		if ($this->config->get('system', 'ini_pcre_backtrack_limit') !== false) {
 			ini_set('pcre.backtrack_limit', (int)$this->config->get('system', 'ini_pcre_backtrack_limit'));
 		}

static/defaults.config.php

@@ -342,11 +342,11 @@ return [
 		'ipv4_resolve' => false,
 
 		// ini_max_execution_time (False|Integer)
-		// Set the number of seconds a script is allowed to run. Default unlimited for Friendica, False means disabled
+		// Set the number of seconds a script is allowed to run. Default unlimited for Friendica, false to use the system value.
 		'ini_max_execution_time' => 0,
 
 		// ini_pcre_backtrack_limit (False|Integer)
-		// This has to be quite large to deal with embedded private photos. False means disabled
+		// This has to be quite large to deal with embedded private photos. False to use the system value.
 		'ini_pcre_backtrack_limit' => 500000,
 
 		// invitation_only (Boolean)