lists/base-fix: restore previous version of /etc/config/foris
The condition is that we run on current root (that we even have easy access to snapshots), that we have snapshots (schnapps installed) and that version of Turris OS is less than 5.1.1. We use system version to compare because we can't detect that empty file any other way.
Hotfixes https://gitlab.nic.cz/turris/turris-os-packages/-/issues/657
Companion MR https://gitlab.nic.cz/turris/turris-os-packages/-/merge_requests/506
Edited by Karel Koci