stop killing so many trees. - #10

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Integrate CORP and COEP

This is part of the introduction of COEP
(whatwg/html#5454). The CORP check now takes
COEP into account. Also, responses coming from service workers
are checked.

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Update fetch.bs

Co-authored-by: Domenic Denicola <d@domenic.me>
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Update fetch.bs

Co-authored-by: Domenic Denicola <d@domenic.me>
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fix

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fix

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fix

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fix

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fix

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fix

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fix

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fix

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fix

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fix

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fix

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fix

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fix

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fix

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Update fetch.bs

Co-authored-by: Anne van Kesteren <annevk@annevk.nl>
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Update fetch.bs

Co-authored-by: Anne van Kesteren <annevk@annevk.nl>
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fix

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fix

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fix

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fix

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fix