mainline: don't make Certificate property virtual
mainline: don't make Certificate property virtual

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