CURLOPT_CERTINFO(3) on macOS

The text 353693e22694, as macOS 10.12.5, macOS 10.12.4, macOS 10.12.3, macOS 10.12.2, macOS 10.12.1, macOS 10.12 shipped it.

request SSL certificate information

CURLOPT_CERTINFO(3) on macOS now