Qian Wang 3b656c9360 Use sync.Once to close die ch		2018-11-23 23:57:35 +00:00
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ck-client	User control server and client	2018-11-22 21:56:29 +00:00
ck-server	Use sync.Once to close die ch	2018-11-23 23:57:35 +00:00