CURLOPT_SSL_VERIFYHOST(3) on macOS

The text 7814823dcde3, 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.

verify the certificate's name against host

CURLOPT_SSL_VERIFYHOST(3) on macOS now