windows: Update raw fetch/store operations

rawops.c is a hold over from Eric Williams' original attempt
to implement an AFS redirector.  When the rest of the his code
was purged from the tree and replaced with a more complete
implementation based upon the Kernel Drivers's File System
framework rawops.c was left behind.

Although the source file has been compiled as part of the build,
its functions ReadData and WriteData have never been called.  This
patchset:

 1. renames the functions to raw_ReadData and raw_WriteData

 2. modifies the function signatures and provides a header
    with prototypes

 3. requires that cm_scache.rw be write-locked upon entry

 4. renames variables

 5. removes the #define CM_BUF_BUFSIZE and relies upon
    cm_data.blockSize instead

 6. Always write back the current range as an async store
    instead of the previous chunk as random write patterns
    will fail to store all of the dirty buffers.

Reviewed-on: http://gerrit.openafs.org/8953
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>
Tested-by: Jeffrey Altman <jaltman@your-file-system.com>
(cherry picked from commit 24b6365169e48d21bbb97fb456860f63389a5bcf)

Change-Id: If35404a6d6647ad5018e62e08ad4795d56c25f3f
Reviewed-on: http://gerrit.openafs.org/9027
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>
Windows: Reduce RDR Object Lifetime

Adjust the redirector object lifetime from 10 minutes (600 seconds)
to 20 seconds.  The object lifetime is how long an object can remain
idle before garbage collection is permitted.

Reviewed-on: http://gerrit.openafs.org/8954
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>
Tested-by: Jeffrey Altman <jaltman@your-file-system.com>
(cherry picked from commit 3e38897012ab8075df96b9e1ecca2a2ebc23cc30)

Change-Id: Iedaabb1bfefe0924836799bdecc82312815c98aa
Reviewed-on: http://gerrit.openafs.org/9028
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>