Windows: Move Authenticated field to CommResultCB

Add the Authenticated state of the request to the CommResultCB
so the redirector knows the state of all requests.

Change-Id: I854735c7fbda958a12fa79232b584b4d14dd8569
Reviewed-on: http://gerrit.openafs.org/9091
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>
Tested-by: Jeffrey Altman <jaltman@your-file-system.com>