Windows: Fix SMB_COM_NEGOTIATE for MS11-043

Windows: Fix SMB_COM_NEGOTIATE for MS11-043

MS11-043 adds response validation for SMB_COM_NEGOTIATE messages
received by the SMB Redirector.  OpenAFS failed to properly specify
a Challenge and DomainName in the response when the security mode
is SMB_AUTH_NONE (or share with password).  This patchset corrects
smb_ReceiveNegotiate() so that it adheres to the protocol specification.

FIXES 130033

Change-Id: I3dc6e571326c7259a39d30bd80b5986ff35c743c
Reviewed-on: http://gerrit.openafs.org/4886
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@openafs.org>
Tested-by: Jeffrey Altman <jaltman@openafs.org>