Added use/vmguest/kvm/x11 use/stage2/kms.

But not install them by default.

Workaround for update bug.
https://bugzilla.altlinux.org/show_bug.cgi?id=37353
https://bugzilla.altlinux.org/show_bug.cgi?id=37354

Suggested by shaba@.

And explicitly add livecd-installer-features.

Suggested by cas@.

Mark some packages as x86 only.

It was removed from Sisyphus.
See 941af7bd "xorg+vaapi: drop libva-driver-vdpau".

There is no jackd packages nowaday, it is
provided by jack-audio-connection-kit.

There is no stardict-gtk packages nowaday, it is
provided by stardict.

There is no gnome-themes-standard-data packages nowaday, it is
provided by gnome-themes-extra-data.

These packages where renamed.

There is no thunderbird-esr packages nowaday, thunderbird-esr
provided by thunderbird.

But don't install them by default.

DEFAULT_SERVICES_ENABLED can be overriden by DEFAULT_SERVICES_DISABLED.

ALT bug #37197.

But not install it by default.

A diablo-like RPG game.

Build rootfs images for ARM.

Otherwise they will be removed by apt-get autoremove.

Suggested by cas@.

It can be usefull and some 3dparty scripts can assume that
it existed.

See thread
https://lists.altlinux.org/pipermail/devel-distro/2019-July/001669.html
for details.

NM uses interal DHCP-client by default now.

Don't allow installation on XFS: seems there is some
problem with grub on XFS.

For security resons.

Use SERVICES_ENABLE variable instead of DEFAULT_SERVICES_ENABLE:
it can be overriden by DEFAULT_SERVICES_DISABLE.

Allow use XFS and BTRFS.

It is more simple then bacula.
Suggested by shaba@.