plication-defined,
        connection-specific <a href="https://tools.ietf.org/html/rfc7230#section-4.1.1" target="_top"><span class="emphasis"><em>chunk-extensions</em></span></a>.
        The last chunk may contain additional HTTP field values in a section of the
        last chunk called a <a href="https://tools.ietf.org/html/rfc7230#section-4.1.2" target="_top"><span class="emphasis"><em>chunk-trailer</em></span></a>.
        The field values are "promised" in the header as a comma delimited
        lis