Windows: Make idle dead timeout very long

Windows: Make idle dead timeout very long

The idle dead timeout processing must eventually be removed
from Rx for initiators.  In the meantime, make the timeout period
ten times longer than the hard dead timeout.  This permits eventual
failure when the server doesn't respond in ten minutes but avoids
more transient issues.

Change-Id: Ia673666dd55b33c4375ee8fdcbb89c82e8b01185
Reviewed-on: http://gerrit.openafs.org/6440
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Tested-by: Jeffrey Altman <jaltman@secure-endpoints.com>
Reviewed-by: Jeffrey Altman <jaltman@secure-endpoints.com>