coreos/etcd — pull request #717 by xiangli-cmu (2014-04-14 01:35:28+00:00)
Title: fix(peer join) fix wrong join command redirection

1. We use PUT request to do a V2 join. So we should redirect a PUT request rather than a POST.
2. /admin only accept V2Join request. Send out V2Join instead of V1Join.