borg: Set additional_free_space when creating backup repo
I think we should configure this for already existing local repos too. I wonder how / when to do this however. When migrating the config to the new version? Maybe this can be done in conjunction with #439 (closed)?
Closes #37 (closed)
Checklist
-
Add entry to the CHANGELOG.md for non-trivial changes
Edited by Fina Wilke