[systemd-devel] [feature request] allow instances in file.preset

[Damien Robert]

I really like the new preset directive, and I plan to use preset files
to synchronise the services I launch at boot across my computers.

However it is a bit cumbersome that preset files do not parse instanced
services files. I could play with DefaultInstance in foobar at .service.d/
droplets and add foobar at .service in the preset file (this works); but this
only allow to configure one instance.

Thanks!