anchor.diff:  -define(NO_INBAND_SECURITY, 0).
   -define(TLS, 1).
   
  --define(LOOP_TIMEOUT, 2000).
  +%% A 2xxx series Result-Code. Not necessarily 2001.
  +-define(IS_SUCCESS(N), 2 == (N) div 1000).
   
   %% RFC 3588:
   %%
  
positive.code:     %% connection with the peer.
  
      try
          2001 == RC
              orelse ?THROW(RC),
          [] == SApps
              andalso ?THROW(no_common_application),
  
negative.code:     case diameter_lib:eval([F|T]) of
          ok ->
              ccb(Rest, T);
          N when ?IS_SUCCESS(N) ->  %% 2xxx result code: accept immediately
              N;
          Res ->
              ?THROW({capabilities_cb, F, rejected(Res)})
  