- eliminate spurious wake up of writeable events.
- eliminate atomic stalls when no snmp info needs update for each interval.
- only trust window update from regular packets, not FEC packets.
$ go version
go version go1.4.2 linux/amd64
xtaci/kcptun@2f0783f
xtaci/kcp-go@39bec2a
xtaci/smux@949ec4d