zopim/ipcluster — pull request #3 by timotheeg (2014-12-08 08:48:42+00:00)
Title: SIGUSR1 now destroys retired workers

master.clear_all() is left around even though is it no longer used. clear_all() also uses the newly
introduced clear_all_retired_workers() which returns a promise.

@yangbin @giantballofyarn