add etersoft groups etersoft/virt-machines etersoft/virt-manager etersoft/gnome-boxes etersoft/virtualbox etersoft/00_office etersoft/libreoffice-still etersoft/libreoffice-latest etersoft/01_games and others

A screensaver is not needed on a CNC and is even harmful.

When there is no plymouth, it must be specified explicitly.

Unification.

Changing the image naming scheme to vendor-distro-DE-kflavour.

Revert 'slinux: use live as installer and rescue also' for slinux-live.
Need to decide whether this target is now needed.
If so, what should now be in it. In the meantime, there was no point
in changing anything about it.

interactivesystem sisyphus-alt25 do not dependency of mingetty.
sysvinit systems do not work without mingetty.

interactivesystem sisyphus-alt25 do not dependency of e2fsprogs.