anchor.diff:  path_tail([_|Rest]) ->
       path_tail(Rest).
   
  -drop_rest_prefix(Path) ->
  +drop_rest_prefix("/" ++ Path) ->
       [$/ | path_tail(Path)].
  
positive.code:                                      {auth,
                                        fun (PReq) ->
                                                menelaus_pluggable_ui:proxy_req(
                                                  RestPrefix, drop_rest_prefix(Path),
                                                  Plugins, PReq)
                                        end};
                                   false ->
  
negative.code:                                      {auth,
                                        fun (PReq) ->
                                                menelaus_pluggable_ui:proxy_req(
                                                  RestPrefix,
                                                  drop_rest_prefix(Req:get(raw_path)),
                                                  Plugins, PReq)
                                        end};
                                   false ->
  