message: allow bigpipe header to stream
diff: @@ -321,6 +321,11 @@ sub vcl_backend_response {
  set beresp.http.Cache-Control = "public, max-age=${VARNISH_ASSETS_TTL:-2628001}";
  set beresp.http.Expires = "" + (now + beresp.ttl);
  }
  + # Disable buffering only for BigPipe responses
  + if (beresp.http.Surrogate-Control ~ "BigPipe/1.0") {
  + set beresp.do_stream = true;
  + set beresp.ttl = 0s;
  + }
  return (deliver);
  }
  