Polkit rule to allow users in group xgrp mount removable storage
devices.

Already in the mainline linux kernel >= 5.10.
See also commit 0e1338a8

From 25fbd9d4

Due to the inadequacy of upstream, the package has not been updated
for a long time.

Fix 'warning: fgrep is obsolescent; using grep -F'

Fix 'warning: egrep is obsolescent; using grep -E'

Needed for bootloding with separate patition /boot.

iputils used to be added, as the iproute2 package depended on it.
iproute2> = 5.17.0-alt2 does not depend on the iputils more.

In order don't show /proc, /sys on Desktop.

- stage2: fix 50-stage2-fs
- desktop+mate: replace package list to metapackages

Fixed regression caused by a commit 7a2f65f9.

- lib/profile.mk: install branding-$$(BRANDING)-release always after basesystem
- stage2: use propagator for c% BRANCH also
- install2, live: don't add priority base packages for these stage
- regular-vm.mk: replace blueberry to blueman for desktop regulars
- tar2fs: avoid losetup race (thanks mike@ and glebfm)
- kernel: drop std-pae kernel flavour
- stage2: add more modules to 50-stage2-net
- output errors Step 3 to BUILDLOG and on screen
- pkg.in/lists/Makefile: sort lists before copying
- regular.mk: drop feature robotics
- education: add latest commits from cas@
- education: mark task-edu-* as metapackages
- slinux, workstation: add latest commits from sem@
- education, slinux, workstation: add fixes for e2k from mike@

There is no point in a feature that adds a two of package lists.

use/slinux/services-enabled and use/slinux/services-disabled do not
require for work adding slinux feature. They need a use/services.

In order to hide warning:
cp: warning: source file 'file' specified more than once

This will save time on identify the causes.

This should be used instead of installer-feature-online-repo.