When Samba4's 'fake' GSSAPI client contacts Windows 2008, and does not
request AP_MUTUAL_REQUIRED, it does not elicit a response packet.
We had previously assumed it was unconditional. Samba3 didn't mind
very much, but Samba4's samba3-like client did, and the behaviour
differed to Win2008 behaviour.
git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@25328 ec53bebd-3082-4978-b11e-865c3cabbd6b