Updated the LDAP connector to work with the latest versions
of OpenLDAP. We now interoperate well with the schemas that are supplied by default with
the OpenLDAP distribution. We do, however, need to extend them with rfc2739.schema and
citadel.schema, which are now supplied with Citadel. We now extend inetOrgPerson into a new
objectClass called citadelInetOrgPerson for this purpose. TODO: we have applied with
IANA for an OID, but we do not have it yet.