r11328: Actually verify that the bind on a pipe succeeded with a samr_connect or

r11328: Actually verify that the bind on a pipe succeeded with a samr_connect or
lsa_openpolicy and fall back appropriately. In particular an ntlmssp bind
failure can not be detected before the first real rpc request, at least
according to abartlet :-)

Works for me against w2k3, w2k and nt4. Sooner or later I should test against
samba4 ... :-)

Volker
(This used to be commit 48a9e35208ae7b6271508085f59833e5def640e8)