Improve compatibility with different LDAP schemas #1494
Improve the auto detection of the member attribute to support more LDAP setups out there. The member attribute should be configurable, but this will be done as a feature addition in the future because it's too much code for the stable release.
Check the entry object for "uniqueMember" and "member" attributes if we cannot determine the correct member attribute from the object class. The member attribute should be configurable eventually. Until that can be done, this fix should improve the situation. Refs #1433
The memberUid attribute of a posixGroup does not contain the DN of the LDAP object but the UID. Check against the ldap entry UID if the DN match didn't work. Refs #1433