coreos/etcd — pull request #1669 by yichengq (2014-11-08 23:58:13+00:00)
Title: *: extract sender to a separate package

This is for better isolation and modularity.

This is the follow up for #1609

It cannot be moved to etcdserver/etcdhttp because this requires etcdserver to import etcdhttp to send message, which leads to cycle import.