For jobs that have reached their CONCLUDED state, prior to having their
last reference put down (meaning jobs that have completed successfully,
unsuccessfully, or have been canceled), allow the user to dismiss the
job's lingering status report via block-job-dismiss.
This gives management APIs the chance to conclusively determine if a job
failed or succeeded, even if the event broadcast was missed.
Note that jobs do not yet linger in any such state, they are freed
immediately upon reaching this previously-unnamed state. such a state is
added immediately in the next commit.
Verbs:
Dismiss: operates on CONCLUDED jobs only.
Signed-off-by: John Snow <address@hidden>
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