Flag locations as paused

[nickelswitte]

Is your feature request related to a problem? Please describe.
I currently have one very large location, that I dont want to back up at the moment. But I would like to keep it in the .autorestic.yml file with all the hooks and configuration there. I just did autorestic backup -a and it (of course) backed up this large location as well.

Describe the solution you'd like
It would be nice to have a flag like status: paused, which would make autorestic skip this location for all future backups, until I set it back to status: active.