Merge branch 'release-v0.16.1' of github.com:matrix-org/synapse

CHANGES.rst

jenkins-dendron-postgres.sh

synapse/__init__.py

synapse/app/homeserver.py

synapse/app/pusher.py

synapse/app/synchrotron.py

synapse/config/_base.py

synapse/config/homeserver.py

synapse/config/logger.py

synapse/config/server.py

synapse/config/workers.py

synapse/federation/federation_base.py

synapse/federation/federation_client.py

synapse/federation/federation_server.py

synapse/federation/replication.py

synapse/federation/transport/server.py

synapse/handlers/auth.py

synapse/handlers/federation.py

synapse/handlers/profile.py

synapse/handlers/register.py