add log for hint
add log for hint

caosiyang/tcpcopy,liviusATnetskope/second,left2right/tcpcopy,horryq/tcpcopy,eliteYang/tcpcopy,eliteYang/tcpcopy,liviusATnetskope/second,left2right/tcpcopy,u20024804/tcpcopy,sshling/tcpcopy,wfxiang08/tcpcopy,daodaoliang/tcpcopy,daodaoliang/tcpcopy,ycaihua/tcpcopy,caosiyang/tcpcopy,wfxiang08/tcpcopy,ycaihua/tcpcopy,horryq/tcpcopy,sshling/tcpcopy,u20024804/tcpcopy