add SCP input script

[aeiodelic]

Pre-Request Checklist

• Passes rubocop code analysis (try rubocop --auto-correct)
• Tests added or adapted (try rake test)
• Changes are reflected in the documentation
• User-visible changes appended to CHANGELOG.md

Description

Needed for some, mainly old, devices that only support backup over SCP.

Solves issue 1802 that was already closed due to not planned.

[aschaber1]

This looks like an interesting extension. I'm going to reopen this :)

Hopefully maybe one of my co-maintainers with more ruby experience have an opinion on this.

[aeiodelic]

This looks like an interesting extension. I'm going to reopen this :)

Hopefully maybe one of my co-maintainers with more ruby experience have an opinion on this.

Thanks. We have this running in our company to backup Fortigate devices by SCP. It has been requested in the issue quoted in the description so I am sure that it must be interesting for at least some people.

[ytti]

I think it is fine basically regardless of its condition, because it doesn't affect anything existing, so there is no real other pressure than 'does it help someone', which is satisfied.