message: Swap use of upstream/downstream in proxy protocol docs.
diff: @@ -6,7 +6,7 @@ Proxy Protocol
  This listener filter adds support for
  `HAProxy Proxy Protocol <https://www.haproxy.org/download/1.9/doc/proxy-protocol.txt>`_.
  -In this mode, the upstream connection is assumed to come from a proxy
  +In this mode, the downstream connection is assumed to come from a proxy
  which places the original coordinates (IP, PORT) into a connection-string.
  Envoy then extracts these and uses them as the remote address.
  