fix attribute lists for LDAP queries
LDAP does not know of an attribute named 'dn'.
To get only the DN in a search, the attriibute list to use is '1.1'.
On all other cases, the DN of the entries found is automaticlly
part of the result set too.
66ab8df0b6c8bb0dcb5dce8a7e8cd6a28e6c7c04 0.2
46dfe9d6f3680bf38aeddda68f014fc8bf6517fc 0.3
664bbe3dcd44e842559978725bf2128538a2b40a 0.4