bugfix: forward socket message
bugfix: socket lib
accepter accepter listen fd
avoid close more than once
bugfix: cup 100%
bugfix: task switch & socket id alloc
bugfix
update cell.lua  =>cell.dispatch =>id=6

readline 与 readbyte 中的wait事件可能被事先清除，导致死等事件
Merge pull request #4 from skysent/patch-1

update cell.lua  =>cell.dispatch =>id=6
.