404. That’s an error.
The requested URL /add?source=atgs&feedurl=http%3A%2F%2Fblog.tut.by%2Frss_recent.php was not found on this server. That’s all we know.
/add?source=atgs&feedurl=http%3A%2F%2Fblog.tut.by%2Frss_recent.php