Log Message:
py-autobahn: updated to 18.11.1

18.11.1
new: forward_for WAMP message attribute (for Crossbar.io Router-to-Router federation)
new: support RawSocket URLs (eg "rs://localhost:5000" or \ 
"rs://unix:/tmp/file.sock")
new: support WAMP-over-Unix sockets for WAMP components ("new API")
fix: use same WAMP serializer construction code for WAMP components ("new \ 
API") and ApplicationSession/Runner
fix: memory leak with Twisted/WebSocket, dropConnection and producer