Windows: SMB GetFileAttributes support

Windows: SMB GetFileAttributes support

commit 56a2cbb5fbdcab51bd5f4720e610796abbce5c41 added a
GetFileAttributes query to the pioctl interface to protect
against printing pages on printers with a broken smb protocol
implementation.   This patchset adds support for GetFileAttribute
on _._AFS_IOCTL_._ files to the SMB implementation.

Reviewed-on: http://gerrit.openafs.org/7524
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 371af87a23b61187ca9d54c8e6819f2121fbf1db)

Change-Id: Id25d124a3c1f70c6506ebe8a1af6a4bad55f2b7f
Reviewed-on: http://gerrit.openafs.org/8625
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>