- fix locale kernel parameter for installation
- use Buster ISO and checksum and switch to AMD64 architecture
- increase memory of VirtualBox VM to 1 GB to allow graphical installer
- avoid CD questions by pre-seeding apt-setup/cdrom
- uninstall gcc-8 instead of gcc-4.8 in scripts/cleanup.sh
- modify hd-media initrd.gz by adding fdisk udeb content needed by the
babelbox partition deletion script