No we don’t need to do any of that, we just need to add one more site setting: it contains
discourse.org
or
example.com
example.co.uk
example.website
We know that anything with a period added to the front of that is allowed. If this setting is not specified, then nofollow is super strict.
Note that @techapj said he fixed a bug with the current handling that seems kind of severe..
So we need that fix..