Group name `root` everywhere! How do we handle this?

DebOps sets almost all config files to be owned by group `root`, which does not exist on FreeBSD. We have two options:

* Change every single line to use a variable instead: all instances of `group: root` would become `group: {{ root_group | d('root') }}`. Set `root_group` to `wheel` on FreeBSD.
* **Advantage:** clean system: things would be owned by group `wheel`, as expected.
* **Disadvantage:** bigger diff vs upstream DebOps
* Create a group named `root` so we don't have to deal with it
* **Advantage:** we won't have to deal with it :D
* **Disadvantage:** Some system files will be owned by group `root`. Will look weird and may violate POLA.

I am leaning towards the first option from the usability viewpoint, but it is very annoying for development. Opinions?