CURLOPT_PROXY_TLS13_CIPHERS(3) on macOS

The text 5fccefb593bc, as macOS 12.2, macOS 12.1, macOS 12.0.1 shipped it.

ciphers suites for proxy TLS 1.3

CURLOPT_PROXY_TLS13_CIPHERS(3) on macOS now