Windows: AFSRedirLib.sys file system library driver

Windows: AFSRedirLib.sys file system library driver

This patchset implements the AFS Redirector Library driver.
This driver contains all of the AFS specific implementation
details for service communication, network provider support,
directory management, extent management, metadata management,
callback invaldation, volume management, file locking, etc.

Rod Widdowson <rdw@steadingsoftware.com> and Jeffrey Altman
<jaltman@your-file-system.com> contributed to the development
of this driver.

Change-Id: Icc18c26b81b96a92096c20e01360007815ca1acb
Reviewed-on: http://gerrit.openafs.org/5438
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Rod Widdowson <rdw@steadingsoftware.com>
Tested-by: Rod Widdowson <rdw@steadingsoftware.com>
Reviewed-by: Jeffrey Altman <jaltman@openafs.org>
Tested-by: Jeffrey Altman <jaltman@openafs.org>