I changed this in https://github.com/hashicorp/consul/pull/8802#pullrequestreview-500779357 because
exceeding the MaxWait seemed wrong, but as other have pointed out, that behaviour is probably correct.
When multiple waiters hit the max value, we don't want them to converge, so restore the behaviour of
allowing jitter to exceed max, and document it.
8a68c6d517