ssh-keysign(8) on macOS

The text 3d9c6bc94228, as OS X 10.11.6, OS X 10.11.5, OS X 10.11.4, OS X 10.11.3, OS X 10.11.2, OS X 10.11.1, OS X 10.11 shipped it.

ssh helper program for host-based authentication

ssh-keysign(8) on macOS now