bozo: avoid canceling the sigkill timer for hung processes

bozo: avoid canceling the sigkill timer for hung processes

A sigkill signal is sent to fileserver processes when a timeout is
exceeded for shutting down processes for the fs/dafs bnode.
(Currently 30 minutes for the fileserver, 1 minute for the other
server processes.)

If the bnode goal is set to run before this timeout expires, the
timer is incorrectly stopped, and a wedged process is never killed.
Fix this by not canceling the timer when a fs/dafs process has been
signaled to shutdown, regardless of the current goal.

Reviewed-on: http://gerrit.openafs.org/7920
Reviewed-by: Derrick Brashear <shadow@dementix.org>
Tested-by: BuildBot <buildbot@rampaginggeek.com>
(cherry picked from commit 09f5a1e6053e6db3df581543875512d8cff259ae)

Change-Id: I0d5fabed13e597d2571033468688457c38b49283
Reviewed-on: http://gerrit.openafs.org/8583
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Ken Dreyer <ktdreyer@ktdreyer.com>
Reviewed-by: Paul Smeddle <paul.smeddle@gmail.com>