Merge pull request #686 from matrix-org/markjh/doc_strings

setup.cfg

synapse/handlers/_base.py

synapse/handlers/auth.py

synapse/handlers/federation.py

synapse/handlers/room_member.py

synapse/handlers/sync.py

synapse/http/servlet.py

synapse/notifier.py

synapse/push/baserules.py

synapse/rest/client/v2_alpha/sync.py

synapse/state.py

synapse/storage/event_push_actions.py

synapse/storage/registration.py

synapse/storage/state.py