etcdhttp: set stats field in peer handler
Merge pull request #1312 from unihorn/165

etcdhttp: set stats field in peer handler
stats: fix data race when recording send result
Merge pull request #1316 from unihorn/168

stats: fix data race when recording send result
etcdserver: fix data race in leaderStats.Followers
Merge pull request #1317 from unihorn/169

etcdserver: fix data race in leaderStats.Followers
raft: remove unused compactThreshold