Setcap causes problems (like issue #1007), so stop using it (and undo
the permission override on upgrade) and instead set capabilities via the
systemd services.
(This also fixes some AssertFileNotEmpty declarations that were in the
wrong places).
- lokinet is the package that configures a lokinet client
- lokinet-router configures a lokinet router
- lokinet-bin contains the binaries both of the above require
