manufacturer and the recogniced GroupDAV client as product name.
This way we are able to handle different GroupDAV clients, as we
allready do with different SyncML clients.
Also removed the no longer needed code enabling the use of the real UID,
as SyncML does no longer misuse the UID for it's GUID.
addressbook (infolog will follow).
CalDAV is tested so far with lightning 0.8 and Apple's iCal. Please note
that both distinguish between iCalServer and CalDAV!
The URL is currently http://domain.com/egroupware/groupdav.php/calendar/