Backport of fcfc4b2 from main.

…urity archive.

Backport of 17b93fa from main.

Co-authored-by: Sarah Boyce <42296566+sarahboyce@users.noreply.github.com>
Co-authored-by: Jake Howard <git@theorangeone.net>

Backport of 90afa9b from main.

…sts.py with --selenium and --parallel.

Backport of c60a708 from main.

Backport of c0d7fbe from main.

Backport of a1ce852 from main.

… checks.

Backport of 8f0abd2 from main.

…ert types.

Co-authored-by: Jacob Walls <jacobtylerwalls@gmail.com>

Backport of a832365 from main.

…rt message.

Bug in 019acad.

Backport of a6977ee from main.

Backport of 4a5e90c from main.

… for release.

Backport of 7436661 from main.

… collisions.

Made signed cookies derive their signer namespace from an injective
encoding of `(name, salt)` while preserving compatibility with legacy
`name + salt` cookies behind SIGNED_COOKIE_LEGACY_SALT_FALLBACK.

Thanks Peng Zhou for the report, and Shai Berger, Markus Holterman,
Jake Howard, and Paul McMillan for reviews.

Co-authored-by: Jacob Walls <jacobtylerwalls@gmail.com>
Co-authored-by: Natalia <124304+nessita@users.noreply.github.com>

Backport of 70d3651 from main.

…fully configured.

Thanks Kasper Dupont for the report, and Jacob Walls and Natalia Bidart
for reviews.

Backport of df887f5 from main.

…ensitively in UpdateCacheMiddleware.

Thanks Ahmed Badawe for the report, and Jacob Walls for reviews.

Backport of d618d7a from main.

…non-public responses.

Thanks Shai Berger for the report, and Natalia Bidart and Sarah Boyce for reviews.

Backport of a2faa8e from main.

…ing Vary header values.

Thanks to Navid Rezazadeh for the report and Jacob Walls for review.

Backport of 42aa0b3 from main.