Addendum:
Grub2-btrfs:
%changelog +* Sun Jul 02 2017 andreas@benzlerweb.de 1.11 - 5 +- harmonized_snapshots_entry now dertemite efi / bios patch, + this should be used for redhat based distros
I think the project is finished.
Maybe I would do well to create a little description. We will see...
Sincerely
Andy