Fabric HTTP Gateway incompatibility with HTTP RFC 7230 specification

Issue

Fabric HTTP Gateway adds "Transfer-Encoding" header field to Response 204.

However, the specification RFC 7230 (https://tools.ietf.org/html/rfc7230) section 3.3.1 clearly says that the "Transfer-Encoding" header field should not be returned in any response with status 204 (No Content) [1]:

A server MUST NOT send a Transfer-Encoding header field in any
response with a status code of 1xx (Informational) or 204 (No
Content). A server MUST NOT send a Transfer-Encoding header field in
any 2xx (Successful) response to a CONNECT request (Section 4.3.6 of
[RFC7231]).

[1] https://tools.ietf.org/html/rfc7230#section-3.3.1