generic LDAP support
|Reported by:||dancab||Owned by:|
Add a generic LDAP mechanism (rc_ldap is specific to Address Book usage).
The code was already created, which basically creates a class named rc_ldap_generic which is a parent class to rc_ldap.
rc_ldap_generic is not supposed to be used by itself (though possible) but to provide a parent class for any extra classes which use the LDAP functionality.