> Those key value pairs in chunked encoding ("chunk extensions") are spec'ed to only be hop-by-hop, which makes them more or less completely unsuitable for actu

> Those key value pairs in chunked encoding ("chunk extensions") are spec'ed to only be hop-by-hop, which makes them more or less completely unsuitable for actually using by end applications. Oof, I hadn't mentally connected those dots, but you're completely right. (As Transfer-Encoding is hop-by-hop, not end-to-end…)