mainline: simplified next command implementation: If next command reader wasn't set, still use current command reader in next round received data processing
mainline: simplified next command implementation: If next command reader wasn't set, still use current command reader in next round received data processing

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