[horde] Horde Webmail authentification methods

[Petar Kazakov]

The IMAP is working just fine.
I have a squirrelmail that is currently working and also abut 50 clients
like MS outlook and thunderbird.

#:> telnet localhost 143
Trying ::1...
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
* OK [CAPABILITY IMAP4rev1 UIDPLUS CHILDREN NAMESPACE THREAD=ORDEREDSUBJECT
THREAD=REFERENCES SORT QUOTA AUTH=CRAM-MD5 AUTH=CRAM-SHA1 AUTH=CRAM-SHA256
IDLE ACL ACL2=UNION STARTTLS] Courier-IMAP ready. Copyright 1998-2005 Double
Precision, Inc.  See COPYING for distribution information.

Peter