Add support for ssh_config ProxyCommand to enable multiple hops in the SCP

To enable scp download from hosts behind a jumphost.

To setup the environment, there is an explanation in https://wiki.gentoo.org/wiki/SSH_jump_host

Milestone changed to %Future Release

If ProxyCommand takes much effort to support, is it possible to add an option to shell out? Or at least copy the equivalent scp command to clipboard?

Hey Dolee :)

That's a good idea. I can't use the same fancy UI, but I could just open a new window to run scp in. I'll take a look at this for version 3.2 (there is a feature freeze for 3.1).

changed milestone to %Review for next version

An alternative for folks who can't use scp is to use this shell script: http://iterm2.com/utilities/it2dl

itd2l filename downloads filename. It's so simple it can't fail.

Hey George :)

I have been using it2dl/it2ul, but I really like drag & drop to upload, right-click to download.