2.1. Client/Server Messaging still is HTTP/1.1-specific. Suggested deletions below:

A client sends an HTTP request to a server in the form of a request message, beginning with a request-line that includes a method, URI, and protocol version (Section 3 of [Messaging]), followed by header fields containing request modifiers, client information, and representation metadata (Section 5 of [Messaging]), an empty line to indicate the end of the header section, and finally a message body containing the payload body (if any, Section 6 of [Messaging]).

A server responds to a client's request by sending one zero or more non-final and exactly one final HTTP response messages, each beginning with a status line that includes the protocol version, a success or error code, and textual reason phrase (Section 4 of [Messaging]), possibly followed by header fields containing server information, resource metadata, and representation metadata (Section 5 of [Messaging]), an empty line to indicate the end of the header section, and finally a message body containing the payload body (if any, Section 6 of [Messaging]).

A connection might be used for multiple request/response exchanges, as defined in Section 9.3 of [Messaging].

Also, trailers?