[PATCH 2 of 2 V2] commandserver: handle backlog before exiting

[Yuya Nishihara]

On Fri, 10 Feb 2017 05:14:20 -0800, Jun Wu wrote:
> Excerpts from Yuya Nishihara's message of 2017-02-10 22:11:26 +0900:
> > Missed setting self._socketunlinked. Perhaps you want self._unlinksocket().
> > 
> > Should I fix it in flight?
> 
> Sorry! It should be "self._unlinksocket()". Thanks for finding it out!

Fixed and pushed.