CURLOPT_QUOTE(3) on macOS

The text 44fdd26ea6c2, 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.

(S)FTP commands to run before transfer

CURLOPT_QUOTE(3) on macOS now