Be more explicit about headers in redirects.
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Apparently it depends on the header whether it is preserved in redirects or not and it is not possible to make a general rule for them. However, all headers have to deal with ("author request headers" in XMLHttpRequest, Last-Event-ID, Ping-To, Ping-From) need to be preserved across redirects so we should make that extra clear in the fetching algorithm.
So... what do I put in the spec here?
(waiting for anne's return)
Something along the lines of "when following a redirect, include each header included in the original request, unless there are specific requirements for the header in question (e.g. Referer changes during redirects)".
This bug was cloned to create bug 17903 as part of operation convergence.
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Rationale: accepted WHATWG change