s3-winbindd: Fix Bug #6711: trusts to windows 2008 (2008 r2) not working.
Winbindd should always try to use LSA via an schannel authenticated ncacn_ip_tcp
connection when talking to AD for LSA lookup calls.
In Samba <-> W2k8 interdomain trust scenarios, LookupSids3 and LookupNames4 via an
schannel ncacn_ip_tcp LSA connection are the *only* options to successfully resolve
sids and names.
Guenther
(cherry picked from commit
6a8ef6c424c52be861ed2a9806f917a64ec892a6)
(cherry picked from commit
3bd36630e402b6215a46f8b0ba98e9e2b18b44eb)