[horde] update password/rename for admin/users

[Chuck Hagenbuch]

Quoting Ilya <mail at krel.org>:

> these are diffs to add update functionality to users. I have tested it
> only with sql, and only password change, as cyrus doesnt support rename of 
> top level mailbox.

Committed, thanks.

-chuck

--
Charles Hagenbuch, <chuck at horde.org>
"After a few minutes the most aromatic and nice smelling Italian coffee 
 will come out of the exhaustpipe." - Our stove-top espresso pot