Added LDAP support to POP3 server

["Alexandre Ghisoli" <alexandre.ghisoli@ycom.ch>]

Hi,

Teapop, an very usefull POP3 server that understand virtual domains and
different auth methods, is now in alpha stage to support LDAP
authentication.

I've developped a little patch that enable this feature.

It works like :

1/ User needs to enter username@domain
2/ This key (username@domain) is used to search an user that have this
mailLocalAddress in LDAP
3/ take the uid/gid for that user
4/ deliver the content of mailbox (/var/spool/mail/$username)


Please, feel free to report comments / bug /enhencements

Regards

	--Alexandre