Revert "proxy works directly with the server without v2ray"

This reverts commit 1b6a95e398.

scripts/start_proxy.sh

@@ -1,6 +1,11 @@
 cat /ssh/key.pub > /root/.ssh/authorized_keys
 service ssh start
-sed "s/\"server_port\": [0-9]\+/\"server_port\": $SSPORT/" /config.json > change_port
-cat change_port > /config.json
+sed -n "s/\"server_port\": \([0-9]\+\),/\1/p" /config.json > current_port
+CURRENT_PORT=$(cat current_port | tr -d " ")
+if [ "$CURRENT_PORT" -ne "443" ]
+then
+    sed "s/\"server_port\": [0-9]\+/\"server_port\": $SSPORT/" /config.json > change_port
+    cat change_port > /config.json
+fi
 /sslocal -v -d -c /config.json
 tail -f /dev/null