loglevel=3 will remove warnings about ACPI errors and processor
vulnerabilities. These messages break silent boot and scare users.
However, we cannot correct these errors.
'loglevel=3' must be after 'quiet'. Otherwise, errors are shown.

Request by Speccyfighter

EDID decoder and conformance tester

See https://bugzilla.altlinux.org/46293

Fixes access for others to targets.log

We cannot get IMAGE_OUTPATH from the build.log, and there is currently
no other mechanism. Creating a CHECK directory was a bad idea. It should
have been created only for CHECK, but it was always created when DEBUG
was not enabled. So it's better to just issue a warning.

gnome-software already depends on it.

mcelog removed from Sisyphus in task 321924.
See: ALT bug 43075

See: https://bugzilla.altlinux.org/46271

See commit 1f066d54

too big for live.

- Sudo is enabled by default.
- Added some GNOME extentions.