Paul d'Aoust

sorry @ddd-mtl didn't see this question before. Just the standard fork detection mechanism -- there's the question of whether one needs spam detection across forks if forks are detected and...

Closed by #4115

keeping this open, as #4115 wasn't completed -- GitHub auto-closed it.

crap, didn't notice my `develop` was so out-of-date. I'll merge it in and push

Closes #3380

I am 100% fine with that @ThetaSinner -- I do know @zippy was saying it's always going to be painful to make these breaking changes, so we should do them...

AC: In a discoverable location (my plan is to put it on an 0.4 upgrade guide, plus the top level module docs for relevant crates), all the feature flags are...

Resolved in #499