changed help for configure
changed help for configure

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