Merge from HEAD client-side authentication changes:

Merge from HEAD client-side authentication changes:

 - new kerberos code, allowing the account to change it's own password
   without special SD settings required
 - NTLMSSP client code, now seperated from cliconnect.c
 - NTLMv2 client code
 - SMB signing fixes

Andrew Bartlett
(This used to be commit 837680ca517982f2e5944730581a83012d4181ae)