Windows: set hard dead timeout not conn timeout for probes

For the Rx connections used for probing VL and FILE servers set a
hard dead timeout and not a connection timeout.   A connection timeout
will not terminate the call as long as the lastReceiveTime continues
to be updated by ping packets.  The hard dead timeout will cause the
connection to fail when the 10 second limit expires.

Change-Id: I371dcd95fc0ff822a205cf903fa6218e80a2b042
Reviewed-on: http://gerrit.openafs.org/11401
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>