Windows: Permit cygwin apps to read from AFS again

Windows: Permit cygwin apps to read from AFS again

For some reason specifying a unique GUID for each open
file based on the cm_fid results in cygwin apps being
unable to read from AFS.  ReadFile() calls fail with
Invalid Device Request errors instead.

While fixing that issue discovered that not all of the
data was properly set for QueryPathInfoAll operations.

LICENSE MIT

Reviewed-on: http://gerrit.openafs.org/388
Tested-by: Asanka Herath <asanka@secure-endpoints.com>
Reviewed-by: Asanka Herath <asanka@secure-endpoints.com>
Tested-by: Jeffrey Altman <jaltman@openafs.org>
Reviewed-by: Jeffrey Altman <jaltman@openafs.org>