Improve Private Storage detection. MCabber now correctly detects Private Storage support when receiving an item-not-found error (which doesn't mean the server has no support for P.S., but that it's empty). I've added a return value to the callback functions. For now the return value is only used for IQ error handling.

 /RAWXML send string

Schickt "string" (raw XML) zu dem Jabber Server.
Es wird keinerlei Überprüfung vorgenommen.

ACHTUNG!
Benutz diesen Befehl nur, wenn du wirklich weisst, was du tust.

Beispiel: "/rawxml send <presence><show>away</show></presence>"