Sylvain Baubeau authored Sep 01, 2016 and Tanu Kaskinen committed Sep 05, 2016

systemd-hostnamed provides an icon for the machine it is running on.
If it is running, module-zeroconf-publish uses this icon for the
'icon-name' attribute in the Avahi properties. module-zeroconf-discover
passes this icon to module-tunnel using the module parameter
{sink/source}_properties.

This allows to display a portable, desktop or phone instead of
the generic sound card icon.