`Content-Transfer-Encoding` is not a valid HTTP header (cf [RFC 7230, section 3.3.1](http://tools.ietf.org/html/rfc7230#section-3.3.1), [RFC 7231, section 8.3](http://tools.ietf.org/html/rfc7231#section-8.3), [IANA Message Header Registry](http://www.iana.org/assignments/message-headers/message-headers.xhtml)). The correct HTTP pendant would be `Transfer-Encoding: identity`, which were entirely bogus.
