Support all the payload header fields described in RFC7230 and RFC7231

[barbu110]

All the payload header fields described in RFC7230 and RFC7321 must be support for a compliant implementation.

• Content-Length
• Content-Range
• Trailer
• Transfer-Encoding (Add support for the "chunked" Transfer Encoding #44, Add support for the "compress" transfer encoding #45, Add support for the "deflate" transfer encoding #46, Add support for the "gzip" transfer encoding #47)