curl_multi_info_read(3) on macOS

The text d7a079256ec2, 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.

read multi stack informationals

curl_multi_info_read(3) on macOS now