Not maintained anymore.

Signed-off-by: David Goulet <dgoulet@torproject.org>

Implement proposal 321 (happy families)

Closes #41009

See merge request !857

(Requested by @nusenu)

I'm hoping that this design will be a bit more ergonomic
than my first idea; the improvement here is that you have to list the family
IDs you expect in your torrc.  This way, there's a cross-check between the
actual keys we use and your configuration for them.

It's kind of long, but I think we might want to explain this stuff?
Maybe we can cut it down.

This implements the client side of happy families.

We want to be really careful to make it clear that the family-list
is not the same as the family itself.

This will eventually be used by relays, but for now it's only going to get used
for round-trip testing.

float-divide-by-zero set in libfuzzer

Closes #24745

See merge request !859

relay: add settings distribution setting and remove moat

See merge request !860

moat is being deprecated and replaced by settings. Let's not give a
warning if 'settings' is set but do if 'moat' is set.