Defailt vpn tls port

src/freedombone-app-vpn

 }
 
 function install_interactive_vpn {
+    read_config_param VPN_TLS_PORT
+    if [ ! $VPN_TLS_PORT ]; then
+        VPN_TLS_PORT=553
+    fi
     VPN_DETAILS_COMPLETE=
     while [ ! $VPN_DETAILS_COMPLETE ]
     do