message: Screen: SendTerminalId reports VT420 (just like xterm).
diff: @@ -600,7 +600,7 @@ void Screen::operator()(SendDeviceAttributes const& v)
  void Screen::operator()(SendTerminalId const& v)
  {
  // terminal protocol type
  - auto constexpr Pp = static_cast<unsigned>(VTType::VT220);
  + auto constexpr Pp = static_cast<unsigned>(VTType::VT420);
  // version number
  // TODO: (PACKAGE_VERSION_MAJOR * 100 + PACKAGE_VERSION_MINOR) * 100 + PACKAGE_VERSION_MICRO
  