Comment 1 for bug 1820886

This has been on my agenda for quite some time. It means apt will need to talk dbus, and it might need to be able to react to a shutdown notification from dbus, which might get pretty complex, but I have not checked in detail.

It's not clear yet which dbus library to use. Starting with systemd's library would be fine, but we might eventually want to move to gdbus if we choose to implement a new apt daemon in apt using dbus, to not have it be linux-specific.