Allow to run ssh commands to localhost

[pierrelemee]

Allow to run ssh commands to localhost

TL;DR: as a user I might want to run SSH commands to a local Docker container. For this, I would propose to add a configuration method allowLocalConnection

I'm trying to execute a set of SSH commands onto a server through Castor 🦫 . As it's aimed to configure a distant server, I'm testing it on a local Docker container (basically a debian base image with the relevant ssh config on top of it) to be able to wipe and start over (using the --force-recreate Docker option).

However, when testing I faced a "Permission denied" error that, after digging, revealed to be caused by the local command override in the Ssh::getExecuteCommand() method.

Although I understand this check, as a developer I would like to be allowed to overcome this by allowing local connection using a Ssh::allowLocalConnection method, like it's done for host check or password authentication. By default, the underlying variable would remain false to keep nominal behavior.

I can propose a patch for it :)