replacing portions

synapse/api/auth.py

synapse/federation/federation_client.py

synapse/federation/federation_server.py

synapse/federation/send_queue.py

synapse/federation/transaction_queue.py

synapse/handlers/appservice.py

synapse/handlers/presence.py

synapse/http/client.py

synapse/http/matrixfederationclient.py

synapse/metrics/__init__.py

synapse/notifier.py

synapse/push/httppusher.py

synapse/push/push_rule_evaluator.py

synapse/python_dependencies.py

synapse/replication/tcp/protocol.py

synapse/util/caches/__init__.py

synapse/util/caches/descriptors.py

synapse/util/caches/dictionary_cache.py

synapse/util/caches/expiringcache.py

synapse/util/caches/response_cache.py