Merge branch 'release-v0.18.1' of github.com:matrix-org/synapse

CHANGES.rst

scripts/synapse_port_db

synapse/__init__.py

synapse/api/auth.py

synapse/app/synchrotron.py

synapse/federation/federation_client.py

synapse/handlers/auth.py

synapse/handlers/federation.py

synapse/handlers/initial_sync.py

synapse/handlers/message.py

synapse/handlers/room_list.py

synapse/handlers/typing.py

synapse/rest/client/v1/initial_sync.py

synapse/rest/client/v1/room.py

synapse/server.py

synapse/storage/event_federation.py

synapse/storage/events.py

synapse/storage/prepare_database.py

synapse/storage/schema/delta/36/readd_public_rooms.sql

synapse/storage/state.py