CURLOPT_SSLCERT(3) on macOS

The text c7970a9a8ea0, 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.

set SSL client certificate

CURLOPT_SSLCERT(3) on macOS now