CURLOPT_MAXREDIRS(3) on macOS

The text 623d8ddb98e7, 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.

maximum number of redirects allowed

CURLOPT_MAXREDIRS(3) on macOS now