I'm in the "users" group and that's enough. None of the ones you listed should be necessary.
nierro wrote:@tomegun, is there a possibility that your polkit with systemd support will hit some repo?I committed it to SVN, but it depends on the maintainer (JGC), and on whether or not any problems crop up with it.
I think making service files is definitely the way to go. We can still use rc.local with systemd (using initscripts-systemd to get the wrapper service). However, it means that everything you do in rc.local is considered as "one" service.