Forward requests with an authenticated client UUID using the header X-Client-Id, the query string ?client_id=<uuid>, or by embedding the UUID in the path.
Use /proxy/<client_id>/<path> to forward requests to Tang.
Example: curl -H 'X-Client-Id: <uuid>' http://localhost:8000/proxy/<uuid>/adv
Fallback examples: curl http://localhost:8000/proxy/<uuid>/adv or curl http://localhost:8000/proxy/adv?client_id=<uuid>