due to linux omiting the final Z(4) in the NTLMv2 reply, and
the need for the windom for LMv2 authentication, here is a new
AuthNTLM ticket request now with length and dom fields.
the nt blob ends with 4 zero bytes, this is not the same as
the EOL av-pair terminator!
this makes ntlmv2 work with windows xp with LmCompatibityLevel = 3
