SSH changed to pubkey auth only

[Mike McGrath]

On Fri, 27 May 2011, Ricky Zhou wrote:

> Hey, just a note to let everybody know, we just switched all of our
> machines to disallow SSH password authentication, so if you were
> previously using passwords to login anywhere, you'll need to use key
> auth now.
>

Also a good time to remind people of ssh -A and the ProxyCommand options.

	-Mike