anchor.diff:  %%
   %% %CopyrightBegin%
   %%
  -%% Copyright Ericsson AB 2010-2016. All Rights Reserved.
  +%% Copyright Ericsson AB 2010-2017. All Rights Reserved.
   %%
   %% Licensed under the Apache License, Version 2.0 (the "License");
   %% you may not use this file except in compliance with the License.
  
positive.code: %% Transport has been removed.
  l({transport, remove, _} = T, #listener{socket = Sock}) ->
      gen_tcp:close(Sock),
      x(T);
  
  %% Possibly death of an accepting process monitored in old code.
  l(_, S) ->
      S.
  
  %% t/2
  %%
  
negative.code: %% death. However, a link can be unlinked and this is exactly what
  %% gen_tcp seems to so. Links should be left to supervisors.
  
  i({listen, Ref, {Mod, Opts, Addrs}}) ->
      [_] = diameter_config:subscribe(Ref, transport), %% assert existence
      {[LA, LP], Rest} = proplists:split(Opts, [ip, port]),
  