Dear Maintainer,

currently the stl package lacks a systemd service.
Attached you find one.

The service contains my specific execution restrictions.
Thus should help working around slt's lack of priviledge dropping.

The systemd service is written by Konrad Mohrfeldt (kmohrf@systemausfall.org)
and released under the public domain.  Feel free to re-license it.

Cheers,
Lars