mainline: included new file SocketServerManager.Performance.cs into .NET 3.5 's project file
mainline: included new file SocketServerManager.Performance.cs into .NET 3.5 's project file

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