A. Internet Media Type message/http

In addition to defining the HTTP/1.0 protocol, this document serves
as the specification for the Internet media type "message/http". The
following is to be registered with IANA [13].

Media Type name: message

Media subtype name: http

Required parameters: none

Optional parameters: version, msgtype

version: The HTTP-Version number of the enclosed message
(e.g., "1.0"). 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: only "7bit", "8bit", or "binary" are
permitted

Security considerations: none