curl_easy_init(3) on macOS

The text d0b7561343ff, as Mac OS X 10.6.8, Mac OS X 10.6.7, Mac OS X 10.6.6, Mac OS X 10.6.5, Mac OS X 10.6.4, Mac OS X 10.6.3 shipped it.

Start a libcurl easy session

curl_easy_init(3) on macOS now