Windows: np AddConnection error code

If AddConnection fails because DeviceIOcontrol fails, do not
return out of memory which is an unsupported error code.  Report
a network failure.

Reviewed-on: http://gerrit.openafs.org/10149
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>
(cherry picked from commit 4bc62d6bd71ece7d1cb91e77d92ac40789f42ddf)

Change-Id: Ifadd9da11daac24b9bc61ce2cd2f6742388443a6
Reviewed-on: http://gerrit.openafs.org/10159
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>
Windows: do not return STATUS_RETRY for rx timeouts

Report the RPC server unavailable instead.

Reviewed-on: http://gerrit.openafs.org/10150
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>
(cherry picked from commit 7ce1997f01a964463c1c04816c63ef28d4dfcc23)

Change-Id: I6d4a876a6ffd08178d76f86fcbe3dd441dc54648
Reviewed-on: http://gerrit.openafs.org/10160
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>