Closed
Description
http://tools.ietf.org/html/rfc7230#section-4.1.2
A sender MUST NOT generate a trailer that contains a field necessary
for message framing (e.g., Transfer-Encoding and Content-Length),
routing (e.g., Host), request modifiers (e.g., controls and
conditionals in Section 5 of [RFC7231]), authentication (e.g., see
[RFC7235] and [RFC6265]), response control data (e.g., see Section
7.1 of [RFC7231]), or determining how to process the payload (e.g.,
Content-Encoding, Content-Type, Content-Range, and Trailer).