Previously, if a process inside a foot client triggered the OOM killer,
systemd would also kill the parent unit, namely the foot server.
This is not ideal if a user has a lot of clients attached, and it's
usually not the terminal emulator's fault that a process inside it has
ended up using all the available memory.
Foot is a fast terminal emulator for Wayland. It can optionally be run
in a client-server configuration.
There are three unit tests to handle an empty configuration, the
default configuration, and systemd service file generation.
