+- MRF: Support for running subchains.
+- Configuration: `skip_thread_containment` option
+- Configuration: `rate_limit` option. See `Pleroma.Plugs.RateLimiter` documentation for details.
+- MRF: Support for filtering out likely spam messages by rejecting posts from new users that contain links.
+- Configuration: `ignore_hosts` option
+- Configuration: `ignore_tld` option