[2.7] bpo-33570: TLS 1.3 ciphers for OpenSSL 1.1.1 (GH-6976) (GH-8760) by stratakis · Pull Request #10607

[2.7] bpo-33570: TLS 1.3 ciphers for OpenSSL 1.1.1 (GH-6976) (GH-8760) by stratakis · Pull Request #10607 · python/cpython

…ythonGH-8760)

Change TLS 1.3 cipher suite settings for compatibility with OpenSSL
1.1.1-pre6 and newer. OpenSSL 1.1.1 will have TLS 1.3 cipers enabled by
default.

Also update multissltests to test with latest OpenSSL.

Signed-off-by: Christian Heimes <christian@python.org>.
(cherry picked from commit 3e630c5)

Co-authored-by: Christian Heimes <christian@python.org>