thanks for Volumio2!
After setting up a Pi3 with volumio-2.041-2016-12-12-pi.img the system basically runs. Presently, output is only via the jack. Streaming WebRadios and Airplay works. However, Volumio doen’t appear as UPNP in any UPNP control point. When checking the plugins in VolumioUI “Installed Plugins” yields an empty page, “Search Plugins” shows a few, but no UPNP plugin. The upnp plugin is present in /volumio/app/plugins/audio_interface/, but not in /data/plugins?