Windows: RDR DeviceObject Characteristics

Set both FILE_DEVICE_SECURE_OPEN and FILE_DEVICE_REMOTE when
creating Device Objects for the AFS Redirector.

Change-Id: I336287817d913c612e2fe7cfbb4198900a846b0f
Reviewed-on: http://gerrit.openafs.org/9698
Reviewed-by: Peter Scott <pscott@kerneldrivers.com>
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>
Tested-by: Jeffrey Altman <jaltman@your-file-system.com>
Windows: FileSystemAttributes = FILE_READ_ONLY_VOLUME

Instead of testing for Characteristics = FILE_READ_ONLY_DEVICE
which applies to the entire device, only return media protected
errors if the volume FileSystemAttributes include FILE_READ_ONLY_VOLUME.

Change-Id: Ice716083c7f0ecb9e80d0ca9e3e143249293d28e
Reviewed-on: http://gerrit.openafs.org/9699
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Peter Scott <pscott@kerneldrivers.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>
Tested-by: Jeffrey Altman <jaltman@your-file-system.com>