r21882: The server part of the code has to use an AUTH_NTLMSSP struct,

r21882: The server part of the code has to use an AUTH_NTLMSSP struct,
not just an NTLMSSP - grr. This complicates the re-use of
common client and server code but I think I've got it right.
Not turned on of valgrinded yet, but you can see it start
to take shape !
Jeremy.
(This used to be commit 60fc9c0aedf42dcd9df2ef9f1df07eaf3bca9bce)