Support_dbus_monitor_for_networkd.mdwn

As of late, systemd-networkd supports a network monitor via dbus under “org.freedesktop.network1“. It would be convenient if the assistant supported this.

Cf. this [commit](http://cgit.freedesktop.org/systemd/systemd/commit/?id=e331e24649213f2e093e16e4d3d64ee823dfc375).

> patches! Awesome! merged [[done]] --[[Joey]]