Fixes #3516 Fixed string in class_timezone.inc

include/class_timezone.inc

@@ -56,7 +56,7 @@ class timezone {
       $tz = $config->get_cfg_value("timezone");
 
       if (!@date_default_timezone_set($tz)) {
-        msg_dialog::display(_("Configuration error"), sprintf(_("The timezone setting '%s' in your fusiondirectory.conf is not valid. Cannot calculate correct timezone offset."), $tz), ERROR_DIALOG);
+        msg_dialog::display(_("Configuration error"), sprintf(_("The timezone setting '%s' in your configuration is not valid. Cannot calculate correct timezone offset."), $tz), ERROR_DIALOG);
       }
       $tz_delta = date("Z", $stamp);
       $tz_delta = $tz_delta / 3600;