message: docs: misc fixes
  fixes
  fixes
diff: @@ -229,6 +229,11 @@ The router will check the request's headers against all the specified
  headers in the route config. A match will happen if all the headers in the route are present in
  the request with the same values (or based on presence if the ``value`` field is not in the config).
  +.. attention::
  +
  + Internally, Envoy always uses the HTTP/2 *:authority* header to represent the HTTP/1 *Host*
  + header. Thus, if attempting to match on *Host*, match on *:authority* instead.
  +
  .. _config_http_conn_man_route_table_route_weighted_clusters:
  Weighted Clusters
  