Address Synology support issues

[rootwyrm]

This is a tracking ticket for Synology issues.

• /sys is not available on Synology, but is required by openrc, creating cgroups problems that can hurt CLR badly
• mono dependent applications (aka still just freaking Sonarr) will cause problems with the Synology itself due to GC behavior (trigger at 90%)
• Needs documentation in general, since the setup is slightly less straightforward

[rootwyrm]

Resolving by getting away from openrc. The last mono dependency is gone.