David Taylor f06be7d295
DEV: Fix multiple set-cookie through Ember-CLI proxy (#19316)
The `Set-Cookie` header is an exceptional case where multiple values are allowed, and should not be joined into a single header. Because of its browser-focussed origins (where set-cookie is not visible), `fetch()` does not have a clean API for this. Instead we have to access the `raw()` data.

This fixes various authentication-related issues when developing via the Ember CLI proxy.
2022-12-05 15:01:55 +00:00
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