CURLOPT_ISSUERCERT(3) on macOS

The text 0866c95feab2, 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.

issuer SSL certificate filename

CURLOPT_ISSUERCERT(3) on macOS now