modified help for udpcopy
modified help for udpcopy

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