anchor.diff:      %% The preservation of Timestamp headers into 100 Trying response is mandated by RFC 3261 8.2.6.1
       AnswerHeader5 = case Status of
   			100 -> AnswerHeader4;
  -			_ -> keylist:delete("Timestamp", AnswerHeader4)
  +			_ -> keylist:delete(timestamp, AnswerHeader4)
   		    end,
       set_response_body(#response{status=Status, reason=Reason, header=AnswerHeader5}, Body).
   
  
positive.code: 
      %% Timestamp still present in 100 Trying check
      autotest:mark(?LINE, "make_response/7 - 1.3"),
      ["1234"] = keylist:fetch("Timestamp", Response1#response.header),
  
      %% correct Content-Length added
      autotest:mark(?LINE, "make_response/7 - 1.4"),
  
negative.code: 
      %% Timestamp NOT present in 486 Busy Here
      autotest:mark(?LINE, "make_response/7 - 2.3"),
      [] = keylist:fetch(timestamp, Response2#response.header),
  
      %% Content-Type NOT present in 486 Busy Here with empty body
      autotest:mark(?LINE, "make_response/7 - 2.4"),
  