tunnel device name acquisition?

[Damien Miller]

On Thu, 12 Oct 2017, Damien Miller wrote:

> The following might do what you want; on the client side it expands
> %T tokens in LocalCommand to the local tunnel device name and exposes
> the remote device name via $SSH_TUNNEL on the server.

I just committed this; it will be in OpenSSH 7.8.

-d