kernel upcall rx env should shut down event daemon

kernel upcall rx env should shut down event daemon

also shut down event daemon in upcall environment

Reviewed-on: http://gerrit.openafs.org/4473
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Tested-by: Derrick Brashear <shadow@dementia.org>
(cherry picked from commit f4776f0a4d51472ee6f2406174b074c03213f7da)

Change-Id: I7b362e0e0d1ac5f028718b522e56101f2bed297e
Reviewed-on: http://gerrit.openafs.org/6288
Tested-by: Derrick Brashear <shadow@dementix.org>
Reviewed-by: Derrick Brashear <shadow@dementix.org>