(only for HEAD at the moment).

(only for HEAD at the moment).

Add NTLMv2 support to our client, used when so configured ('client use NTLMv2 =
yes') and only when 'client use spengo = no'.  (A new option to allow the
client and server ends to chose spnego seperatly).

NTLMv2 signing doesn't yet work, and NTLMv2 is not done for NTLMSSP yet.

Also some parinoia checks in our input parsing.

Andrew Bartlett
(This used to be commit 85e9c060eab59c7692198f14a447ad59f05af437)