coreos/etcd — pull request #1788 by yichengq (2014-11-26 00:25:30+00:00)
Title: rafthttp: increase the size of streaming buffer

The old 1024 value is too small and is very likely to be full and
break the streaming in good path.

Moreover, A bigger value may help write more into the io.Writer when switching
to handle goroutine.