Merge remote-tracking branch 'origin/release-v1.47'

synapse/__init__.py

synapse/_scripts/review_recent_signups.py

synapse/api/errors.py

synapse/api/filtering.py

synapse/api/urls.py

synapse/app/_base.py

synapse/app/admin_cmd.py

synapse/app/generic_worker.py

synapse/app/homeserver.py

synapse/config/account_validity.py

synapse/config/cas.py

synapse/config/emailconfig.py

synapse/config/oidc.py

synapse/config/registration.py

synapse/config/saml2.py

synapse/config/server.py

synapse/config/sso.py

synapse/config/workers.py

synapse/crypto/keyring.py

synapse/events/__init__.py