message: [script] disable DNS of dnsmasq when DNS64 is on
  This commit disables DNS of dnsmasq when DNS64 is enabled, because
  bind9 provides DNS service already.
diff: @@ -330,6 +330,12 @@ network_manager_install()
  return 0
  fi
  + if with DNS64; then
  + # bind9 provides DNS service
  + sudo sed -i 's/^#port=5353/port=0/g' /etc/dnsmasq.conf
  + sudo systemctl stop dnsmasq
  + fi
  +
  sudo systemctl daemon-reload
  sudo systemctl stop wpa_supplicant || true
  @@ -372,6 +378,12 @@ network_manager_uninstall()
  {
  with NETWORK_MANAGER || return 0
  + if with DNS64; then
  + # revert changes to dnsmasq
  + sudo sed -i 's/^port=0/#port=5353/g' /etc/dnsmasq.conf
  + sudo systemctl restart dnsmasq
  + fi
  +
  if ! have systemctl; then
  echo "This script requires systemctl!"
  return 0
  