Document how join and authentication limits apply to anonymous connections.
- 20 authenticate attempts per 10 seconds per user (200 for verified bots)
- 20 join attempts per 10 seconds per user (2000 for verified bots)
however it's unclear how these limits apply to anonymous connections. Is there no limit to join attempts at all when you have authenticated as an anonymous user? And do authentication attempts for anonymous users (NICK justinfan12345) count towards the rate limit?