Help us bring RescueLoop to Linux

[ostapondo]

Linux is the next platform for RescueLoop. We want to start small and get the basics right.

The first step is to:

• detect service and process failures
• keep the evidence small and local
• add tests that do not depend on one distro
• make installation and removal boring

The work starts in issue #3. If you know systemd, journald, Linux packaging, or just run a distro we do not test, your help is useful.