Merge branch 'release-v0.22.0' of github.com:matrix-org/synapse

CHANGES.rst

README.rst

UPGRADE.rst

scripts/synapse_port_db

synapse/__init__.py

synapse/api/auth.py

synapse/app/client_reader.py

synapse/app/federation_sender.py

synapse/app/media_repository.py

synapse/app/synchrotron.py

synapse/app/user_dir.py

synapse/appservice/__init__.py

synapse/config/homeserver.py

synapse/config/push.py

synapse/config/server.py

synapse/federation/transaction_queue.py

synapse/handlers/auth.py

synapse/handlers/device.py

synapse/handlers/federation.py

synapse/handlers/message.py