Merge branch 'release-v0.24.0' of github.com:matrix-org/synapse

CHANGES.rst

docs/sphinx/conf.py

scripts/synapse_port_db

synapse/__init__.py

synapse/app/synchrotron.py

synapse/config/_base.py

synapse/config/groups.py

synapse/config/homeserver.py

synapse/config/key.py

synapse/config/password_auth_providers.py

synapse/config/registration.py

synapse/config/repository.py

synapse/config/spam_checker.py

synapse/config/tls.py

synapse/event_auth.py

synapse/events/spamcheck.py

synapse/federation/federation_base.py

synapse/federation/federation_server.py

synapse/federation/transaction_queue.py

synapse/federation/transport/client.py