So we are can to build compressed img files.

Suggested by testers.

This reverts commit bf762a26.
The issue on RPi3 is not observed with firefox-esr-78.9.0-alt0.1.p9

For FAT partitions on non-EFI images (e.g. i586).

Celluloid segfaults on Jetson Nano, so use vlc there, but keep
celluloid for other aarch64 systems.

Suggested by mike@.

- build propagator and copy kernel in mkimage-profiles
- copy kernel to boot/ directory on iso image
- multiple kernels support for iso with grub
- add support initrd.img instead full.cz in stage1 with grub, syslinux
- use method:cdrom,fuid instead method:disk,uuid in uuid-iso feature
  (thanks jqt4@)
- vmguest: Drop virtualbox-addition kernel modules
- fix make distclean
- reports.mk: Generate rpm and srpms lists
- add hdt for grub-pc (floppy disk image)
- add items boot with local drive for grub-pc (iso)
- oem: use/deflogin/root
- add switch sddm|lightdm for kde5
- education 9.2 beta

use/grub/localboot, use/grub/sdab similar to use/syslinux/localboot,
use/syslinux/sdab.

Since there is now an HDT (Hardware Detection Tool) for grub-pc,
there is not reason use syslinux.

Note: syslinux --install needed /proc, so:
@$(call set,GLOBAL_HSH_PROC,1)

See-also: mkimage/doc/README.ru

memtest is not part of syslinux.
Also replace tabs to spacebar.

This change sets the default root password to 'altlinux'
for all the images that employ use/oem feature.
This password will be reset by the configuration wizard at
the first boot and cannot be used to login
to ssh even if it's enabled out-of-the-box. So, 'happy
path' user experience of our distros does not change;
but it helps in troubleshooting the cases
when alterator-setup cannot start e.g. due to broken
graphics.

See https://lists.altlinux.org/pipermail/devel-distro/2021-April/002351.html

Raising the priority of a targeted package does not help, and
lowering the priority of a non-targeted package helped.

Because of this, distclean did not work. Only the symlink was
removed.

Previously, when rebuilding, the new reports were copied as a
subdirectory.

method=disk has a number of unsolved problems in the installer.

Input doesn't work without udev-rule-generator-net.

Removed from Sisyphus:
http://git.altlinux.org/tasks/archive/done/_263/269335
http://git.altlinux.org/tasks/archive/done/_263/269353

Already in the mainline linux kernel >= 5.10.