Windows: RDR capture Cc/Mm exceptions do not break

All of the Cc and Mm functions are wrapped in try/except blocks.
The purpose is to ensure that Cc and Mm do not return an error as
an exception which could result in the afs redirector failing to
release a resource.   Instead of calling the AFS exception handler
just handle the exception with EXCEPTION_EXECUTE_HANDLER.  This permits
the __except block to capture the exception code.

The AFS exception handler will throw its own exception if the
AFSDebugFlags AFS_DBG_BUGCHECK_EXCEPTION bit is set.  This is helpful when
debugging exceptions thrown by errors in the afs redirector code.  It is
not helpful when a Cc function throws an exception.  For example,
CcReadCopy() will throw STATUS_DELETE_FILE as an exception if an attempt
to read from a deleted file is initiated.   This should simply fail the
read operation not BSOD the system.

Reviewed-on: http://gerrit.openafs.org/10524
Tested-by: Jeffrey Altman <jaltman@your-file-system.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>
(cherry picked from commit 9b6f79108725dc5b6d4cbea4697199e5e745dc99)

Change-Id: I444915bacd73a991860a9952aa932ad1b5ac0de7
Reviewed-on: http://gerrit.openafs.org/10536
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>
Windows: RXAFS_GetVolumeStatus no PRSFS_READ check

Since d2d591caf2c9b4cf2ebae708cc9b4c8b78ca5a5a the file server no
longer performs a PRSFS_READ access check for the GetVolumeStatus RPC.
The cache manager should no longer test for PRSFS_READ as a means of
avoiding RPCs that are known to fail.

Reviewed-on: http://gerrit.openafs.org/10532
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>
(cherry picked from commit 2c8d55bee128071807143db6e880a4a6afaea9ba)

Change-Id: Ie2d2e610017e5be82717c23d8f5742fa12d0b8f3
Reviewed-on: http://gerrit.openafs.org/10537
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>