Add support for NTLMv2 (tested!) with NTLMSSP.

Add support for NTLMv2 (tested!) with NTLMSSP.

The problem was the NTLMv2 uses extra data in order to make reply/lookup
more difficult.  That extra data includes the hostname, and the domain.

This matches Win2k (sort of) by sending this information.

Win2k connects with LMCompatibilityLevel=5 without a problem.

We can change the negotiation bits if we want, this should allow us to make
NTLMv2 the default for other clients as well.

Some of the extra #defines were found in the squid source.

Andrew Bartlett
(This used to be commit 17a5f67b3d1935baf6197ae967624eb847b66ac8)