Allow processor to keep running when queue gets empty

The one problem with ✨ Restore `timeout` option for Drush command Fixed is that an empty queue will cause a daemonized runner to keep restarting the command over and over and over again instead of periodically if the queue is empty.

If the queue is empty, the command will quit. Then it will be run again. I'm not sure if this good or bad.

Will give this patch a try, patch had to be re-rolled.

I think this is good to go, this has been in use in 5 different production websites for 2 months.

Committed, thanks @johnwebdev!

I honestly don't see why the processor should every quit when the queue is empty. I know we originally implemented it that way, but I have no recollection why. Most other queue processors will sleep for a configurable amount of seconds, then try to claim a job again.

Automatically closed - issue fixed for 2 weeks with no activity.