Bugfix: Apache2 plugin uses app->system before including it.

Author: mcramer

server/plugins-available/apache2_plugin.inc.php

@@ -1355,6 +1355,7 @@ function delete($event_name,$data) {
 
 		// load the server configuration options
 		$app->uses('getconf');
+		$app->uses('system');
 		$web_config = $app->getconf->get_server_config($conf['server_id'], 'web');
 
 		$app->system->web_folder_protection($data['new']['document_root'],false);
@@ -2336,4 +2337,4 @@ public function create_relative_link($f, $t) {
 
 } // end class
 
-?>
+?>