Title: zpool_status: Fixed crash if pool has been deleted or vanished
Level: 1
Component: checks
Class: fix
Compatible: compat
Edition: cre
State: unknown
Version: 1.2.8p27
Date: 1511163595

The service would crash if a previously detected pool has been removed/deleted
or vanished for some reasons. This is now fixed and the service output will
reflect that no pool is available.
