[fetch] Vary:-header refers to request headers, not response headers (#220)

If I understand the [`Vary:`-header specification](http://tools.ietf.org/html/rfc7231#section-7.1.4) and [a blog post about "Caching with CORS"](https://www.fastly.com/blog/caching-cors) correctly, the header refers to request headers like `Accept-Encoding`, and not response headers. So the example should `Vary` on the `Origin` request header, not the `Access-Control-Allow-Origin` response header.
You can view, comment on, or merge this pull request online at:

  https://github.com/whatwg/fetch/pull/220

-- Commit Summary --

  * Vary:-header refers to request headers, not response headers

-- File Changes --

    M Overview.src.html (2)

-- Patch Links --

https://github.com/whatwg/fetch/pull/220.patch
https://github.com/whatwg/fetch/pull/220.diff

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Reply to this email directly or view it on GitHub:
https://github.com/whatwg/fetch/pull/220