Windows: fs getcalleraccess

Windows: fs getcalleraccess

Implement VIOC_GETCALLERACCESS and associated 'fs getcalleraccess'
for Windows.  Varies from the Unix implementation in the following
ways:

 * getcalleraccess supports the -literal switch to permit
   querying rights of symlinks and mount points

 * multiple files can be provided on a single command line

The VIOC_GETCALLERACCESS pioctl returns the user access rights
and the anyuser access rights.

Change-Id: I75f636956bbafcc91144b44bd2d7729b8643605c
Reviewed-on: http://gerrit.openafs.org/8598
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>
Tested-by: Jeffrey Altman <jaltman@your-file-system.com>