MEDIUM: listeners: support unstoppable listener

An unstoppable listener is a listener which won't be stop during a soft
stop. The unstoppable_jobs variable is incremented and the listener
won't prevent the process to leave properly.

It is not a good idea to use this feature (the LI_O_NOSTOP flag) with a
listener that need to be bind again on another process during a soft
reload.
2 files changed