FROM RFC 2616

       Media Type name:         application
       Media subtype name:      http
       Required parameters:     none
       Optional parameters:     version, msgtype
        version: The HTTP-Version number of the enclosed messages
                 (e.g., "1.1"). If not present, the version can be
                 determined from the first line of the body.
        msgtype: The message type -- "request" or "response". If not
                 present, the type can be determined from the first
                 line of the body.
       Encoding considerations: HTTP messages enclosed by this type
                 are in "binary" format; use of an appropriate
                 Content-Transfer-Encoding is required when
                 transmitted via E-mail.
       Security considerations: none