William Woodruff 0876b921b2 gh-107361: strengthen default SSL context flags (#112389) ...

This adds `VERIFY_X509_STRICT` to make the default
SSL context perform stricter (per RFC 5280) validation, as well
as `VERIFY_X509_PARTIAL_CHAIN` to enforce more standards-compliant
path-building behavior.

As part of this changeset, I had to tweak `make_ssl_certs.py`
slightly to emit 5280-conforming CA certs. This changeset includes
the regenerated certificates after that change.

Signed-off-by: William Woodruff <william@yossarian.net>
Co-authored-by: Victor Stinner <vstinner@python.org>

2024-03-06 13:44:58 -08:00

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