read client preface in server
read client preface in server

cmars/tools,raboof/net,cesanta/goxnet,raboof/net,cesanta/goxnet,albertjin/golang-net,gomini/net,golang/net,cmars/tools,albertjin/golang-net,cmars/tools,cmars/tools,gomini/net,DramaFever/golang.org-x-net,DramaFever/golang.org-x-net