Fix client connect for out of date servers
Fix client connect for out of date servers

Summary: Currently we memoize the connection to the server, since there is a
limit to how many pending connections a server may receive. However sometimes
we connect to a server, see that it's out of date, kill it, and start a new
server. This means we need to throw away the old connection and open a new one.

Reviewed By: mroch

Differential Revision: D2676773

fb-gh-sync-id: 6fcf86706ce8c4d6d2784088dd6f93b0a5766703

d14b3l/flow,AprilArcus/flow,d14b3l/flow,jamesgpearce/flow,jeffmo/flow,gabelevi/flow,shiftcars/flow,JonathanUsername/flow,jamesgpearce/flow,AprilArcus/flow,gabelevi/flow,claudiopro/flow,facebook/flow,AprilArcus/flow,graue/flow,cesarandreu/flow,popham/flow,jeffmo/flow,nmote/flow,MichaelDeBoey/flow,TiddoLangerak/flow,MichaelDeBoey/flow,TiddoLangerak/flow,chenglou/flow,OCamlPro/flow,jamesgpearce/flow,jgrund/flow,popham/flow,shiftcars/flow,AgentME/flow,facebook/flow,ForbesLindesay/flow,popham/flow,d14b3l/flow,gabro/flow,samwgoldman/flow,gabro/flow,facebook/flow,chenglou/flow,fletcherw/flow,cesarandreu/flow,OCamlPro/flow,ForbesLindesay/flow,gabelevi/flow,jdelStrother/flow,shiftcars/flow,JonathanUsername/flow,samwgoldman/flow,fletcherw/flow,AgentME/flow,gabro/flow,ylu1317/flow,nmote/flow,shiftcars/flow,MichaelDeBoey/flow,fletcherw/flow,nmote/flow,MichaelDeBoey/flow,jdelStrother/flow,shiftcars/flow,AprilArcus/flow,TiddoLangerak/flow,ylu1317/flow,ylu1317/flow,jeffmo/flow,mroch/flow,mroch/flow,samwgoldman/flow,mroch/flow,TiddoLangerak/flow,AgentME/flow,mroch/flow,samwgoldman/flow,gabelevi/flow,claudiopro/flow,JonathanUsername/flow,samwgoldman/flow,cesarandreu/flow,d14b3l/flow,popham/flow,ForbesLindesay/flow,nmote/flow,gabro/flow,MichaelDeBoey/flow,mroch/flow,gabelevi/flow,JonathanUsername/flow,jeffmo/flow,d14b3l/flow,JonathanUsername/flow,gabelevi/flow,jdelStrother/flow,claudiopro/flow,ForbesLindesay/flow,ylu1317/flow,shiftcars/flow,cesarandreu/flow,jgrund/flow,jamesgpearce/flow,AprilArcus/flow,AgentME/flow,jgrund/flow,facebook/flow,chenglou/flow,jamesgpearce/flow,facebook/flow,nmote/flow,AgentME/flow,ForbesLindesay/flow,graue/flow,graue/flow,jamesgpearce/flow,TiddoLangerak/flow,samwgoldman/flow,claudiopro/flow,jgrund/flow,ylu1317/flow,JonathanUsername/flow,d14b3l/flow,mroch/flow,jgrund/flow,graue/flow,gabro/flow,chenglou/flow,jeffmo/flow,OCamlPro/flow,mroch/flow,chenglou/flow,jdelStrother/flow,jeffmo/flow,nmote/flow,popham/flow,fletcherw/flow,popham/flow,gabro/flow,fletcherw/flow,jgrund/flow,chenglou/flow,graue/flow,JonathanUsername/flow,facebook/flow,facebook/flow,fletcherw/flow,jamesgpearce/flow,OCamlPro/flow,nmote/flow,samwgoldman/flow,ForbesLindesay/flow,AprilArcus/flow,gabelevi/flow,popham/flow,claudiopro/flow,jdelStrother/flow,graue/flow,jdelStrother/flow