On Thu, Oct 15, 2020 at 05:18:49PM +1100, Mark Nottingham <mnot@xxxxxxxx> wrote: > GET /html/rfc7230 HTTP/1.1 > Host: tools.ietf.org > Is-Christian: ?0 That header isn't registered, so you really should be using X-Is-Christian: ... which makes me wonder whether you were building up to that clever pun deliberately by leaving off his last name. -- Cos