Add an example for how to use cvs(1) to checkout code over a ssh channel.
This is useful because anonymous cvs over ssh is more secure, as we can
identify server's identity, etc.

TODO: (1) More comments on why and when to use cvs over ssh;
(2) I think it might be a good idea to publish servers'

	    fingerprints as well for security concerns.

Submitted by: Brad Davis <so14k at so14k.com>
PR: 72018