Merge pull request #4678 from matrix-org/rav/tls_install_instructions

INSTALL.md

changelog.d/4681.misc

synapse/config/api.py

synapse/config/appservice.py

synapse/config/captcha.py

synapse/config/cas.py

synapse/config/consent_config.py

synapse/config/groups.py

synapse/config/jwt_config.py

synapse/config/key.py

synapse/config/logger.py

synapse/config/metrics.py

synapse/config/password.py

synapse/config/password_auth_providers.py

synapse/config/push.py

synapse/config/ratelimiting.py

synapse/config/registration.py

synapse/config/repository.py

synapse/config/room_directory.py

synapse/config/saml2_config.py