Transfer-Encoding and HTTP/1.1 "or later" #297

   A client &MUST-NOT; send a request containing Transfer-Encoding unless it
   knows the server will handle HTTP/1.1 (or later) requests; such knowledge
   might be in the form of specific user configuration or by remembering the
   version of a prior received response.
   A server &MUST-NOT; send a response containing Transfer-Encoding unless
   the corresponding request indicates HTTP/1.1 (or later).