Issue Template

Title: Feature request - Terminate upstream connection after every request/stream

Description:
Currently envoy keeps the connection open to upstream cluster. But we want to disable it. Already tried max_requests_per_connection:1 and max_concurrent_streams: 1. We want the upstream connection to close after every request.
One use case is: Upstream instance has multi-process model and uses SO_REUSEPORT to balance requests between connections. With one persistent connection open to a process, all requests will end up being served by same worker process.