Review request for a few WebAppSec specs.

BCC: public-webappsec@, FYI.
CC: <WebAppSec editors/chairs>

Hello, lovely TAG folks. The WebAppSec WG has a few specifications in
flight for which we're actively seeking feedback. One or more of them might
be interesting to you; if you have some spare time, I think we'd very much
appreciate your feedback:

CSP2: https://w3c.github.io/webappsec/specs/content-security-policy/
Mixed Content: https://w3c.github.io/webappsec/specs/mixedcontent/
Referrer Policy: https://w3c.github.io/webappsec/specs/referrer-policy/
Subresource Integrity:
https://w3c.github.io/webappsec/specs/subresourceintegrity/

The first three are in pretty good shape both in terms of the spec text and
implementations. The last (SRI) would be more of a pre-review, but would
still be helpful for us.

Thanks!

--
Mike West <mkwst@google.com>
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