release connection when query done in mysql socket
release connection when query done in mysql socket

maxzhang/thinkjs,akira-cn/thinkjs,akira-cn/thinkjs,75team/thinkjs,thinkjs/thinkjs,maxzhang/thinkjs,maxzhang/thinkjs,Qihoo360/thinkjs,75team/thinkjs,snadn/thinkjs,75team/thinkjs,akira-cn/thinkjs