backport oomd commit from upstream (d784a8d)

Backport fixes nspawn.
Don't enable audit by default.

249.12.
Replace egrep by "grep -E".

249.11.
udev is owner of /etc/systemd/network dir.
disable firstboot service.

249.10 (Fixes: CVE-2021-4034)

249.9 (Fixes: CVE-2021-3997)

Provides ntp-server was disable temporary in systemd-timesyncd.

Add /etc/sysctl.conf to systemd-sysctl-common package.
Add /etc/modules to new systemd-modules-common package.
Add Provides/Obsoletes systemd-utils to systemd-utils-standalone package.
Add Conflicts systemd to systemd-utils-standalone package.

Fix package org.freedesktop.systemd1.policy (ALT#41595).
Avoid chrooted-resolv requirements.

update-helper: add missing loop over user units

unit_is_bound_by_inactive: fix return pointer check

Merge services files to main systemd package.
Merge utils files to main systemd package.

Add requires libnss-systemd to main systemd package for allow

249.7

249.6

Disable pager Hyperlink ANSI sequence support.
Update post scripts for nss modules.