improved the code of async sending
improved the code of async sending

jmptrader/SuperSocket,kerryjiang/SuperSocket,mdavid/SuperSocket,jmptrader/SuperSocket,chucklu/SuperSocket,kerryjiang/SuperSocket,ZixiangBoy/SuperSocket,chucklu/SuperSocket,ZixiangBoy/SuperSocket,jmptrader/SuperSocket,mdavid/SuperSocket,ZixiangBoy/SuperSocket,fryderykhuang/SuperSocket,mdavid/SuperSocket,chucklu/SuperSocket,fryderykhuang/SuperSocket,fryderykhuang/SuperSocket,memleaks/SuperSocket