r18761: Even if only offering NTLMSSP Windows (tested with Vista & XP) sends 0 as the

r18761: Even if only offering NTLMSSP Windows (tested with Vista & XP) sends 0 as the
key length in the case of extended security. It does make sense because with
SPNEGO our beloved ASN1 structure gives us the length.

Next test I did to verify this: I modified the server to put in random
garbage, and W2kwks, XP, Vista and W2k3srv still talked to us.

Volker