curl_easy_perform(3) on macOS

The text 0deaf59ca5ca, 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.

Perform a file transfer

curl_easy_perform(3) on macOS now