CURLOPT_TELNETOPTIONS(3) on macOS

The text 44f2e8c0fe53, 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.

custom telnet options

CURLOPT_TELNETOPTIONS(3) on macOS now