[handler-set] must flatten then determine unique
[handler-set] must flatten then determine unique

miyakawataku/sensu,portertech/sensu,pauloconnor/sensu,npe9/sensu,crewton/sensu,zuazo-forks/sensu,m4ce/sensu,somic/sensu,bf4/sensu,sensu/sensu,solarkennedy/sensu,Tapjoy/sensu-mirror,disqus/sensu,javrasya/sensu,upfluence/sensu,disqus/sensu,roobert/sensu,rbramwell/sensu,quodlibetor/sensu,keymone/sensu,cread/sensu,yonglehou/sensu,withnale/sensu