Change ratelimits.validateIdForName to call the appropriate validate
function based on the contents of the to-be-validated ID, rather than
falling back and potentially performing multiple validations.
Previously, if an ID like "12345:bad.domain" was passed into this
function, it would fail the first validateRegIdDomain validation due to
having a bad domain name (no TLD), fall back to the simpler
validateRegId function, and then fail that because it contains a colon.
This obscured the true reason for the failure. Changing this code to not
fall back means that the true reason for the id validation failure will
be exposed in the error message.
Integrate the key-value rate limits from #6947 into the WFE. Rate limits
are backed by the Redis source added in #7016, and use the SRV record
shard discovery added in #7042.
Part of #5545
Phil Porada
Aaron Gable
Samantha