Windows: Client handling of VNOSERVICE

Windows: Client handling of VNOSERVICE

VNOSERVICE should not be grouped together with the volume status
error codes.  It is used to indicate that the RPC was not serviced.
The file server issues it when its idle dead timeout period is reached
while receiving rx call data.  The client's existing status information
is still valid and the client can retry the call.

Reviewed-on: http://gerrit.openafs.org/6938
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@secure-endpoints.com>
Tested-by: Jeffrey Altman <jaltman@secure-endpoints.com>
(cherry picked from commit 39964d08792f3a09694f97d7c7fa76a86ca213a7)

Change-Id: I96b831e3a2eae04e96062f9c269eb7325e76c439
Reviewed-on: http://gerrit.openafs.org/6941
Reviewed-by: Jeffrey Altman <jaltman@secure-endpoints.com>
Tested-by: Jeffrey Altman <jaltman@secure-endpoints.com>