Fixed typo

Author: riobard

main.go

@@ -61,7 +61,7 @@ func main() {
 	flag.StringVar(&flags.Plugin, "plugin", "", "Enable SIP003 plugin. (e.g., v2ray-plugin)")
 	flag.StringVar(&flags.PluginOpts, "plugin-opts", "", "Set SIP003 plugin options. (e.g., \"server;tls;host=mydomain.me\")")
 	flag.BoolVar(&flags.UDP, "udp", false, "(server-only) enable UDP support")
-	flag.BoolVar(&flags.UDP, "tcp", true, "(server-only) enable TCP support")
+	flag.BoolVar(&flags.TCP, "tcp", true, "(server-only) enable TCP support")
 	flag.BoolVar(&config.TCPCork, "tcpcork", false, "(client-only) enable TCP_CORK (Linux) or TCP_NOPUSH (BSD) for the first few packets")
 	flag.DurationVar(&config.UDPTimeout, "udptimeout", 5*time.Minute, "UDP tunnel timeout")
 	flag.Parse()