Fix mtg startup failure in due to the error in obtaining the public ip

mtproxy.sh

@@ -424,10 +424,11 @@ function get_run_command(){
       domain_hex=$(str_to_hex $domain)
       client_secret="ee${secret}${domain_hex}"
       local local_ip=$(get_local_ip)
+      public_ip=$(get_ip_public)
 
       # ./mtg simple-run -n 1.1.1.1 -t 30s -a 512kib 0.0.0.0:$port $client_secret >/dev/null 2>&1 &
       [[ -f "./mtg" ]] || (echo -e "提醒：\033[33m MTProxy 代理程序不存在请重新安装! \033[0m" && exit 1)
-      echo "./mtg run $client_secret $proxy_tag -b 0.0.0.0:$port --multiplex-per-connection 500 --prefer-ip=ipv6 -t $local_ip:$web_port"
+      echo "./mtg run $client_secret $proxy_tag -b 0.0.0.0:$port --multiplex-per-connection 500 --prefer-ip=ipv6 -t $local_ip:$web_port" -4 "$public_ip:$port"
   else
       curl -s https://core.telegram.org/getProxyConfig -o proxy-multi.conf
       curl -s https://core.telegram.org/getProxySecret -o proxy-secret