Support tunneling of commands

[krlmlr]

I'd like to run commands on the remote host directly, via something like

ssh IqKsfoiclsNnxqztDKoj:[email protected] echo ok

Currently, I'm seeing error output when trying this.

Is this something as easy as starting sshd with less restrictive options? Is this something you would support, perhaps via switch?

Use case: when debugging GitHub Actions run, I'd like to connect to the workers with VS Code. I guess this feature is a prerequisite here, not sure it will be sufficient, though.

Is this related to #181?