kmod is too fast and then sg races with sd, causing the latter to not see SCSI disks.

Closes: #752591, #752605

/lib/lsb/init-functions.d/40-systemd unconditionally uses "set +e; set
+u". This can change the behavior of init scripts that use "set -e"
and/or "set -u".

Change the systemd integration to not rely on "set +e" or "set +u" but
instead work correctly in all cases by catching all commands that might
fail.

Closes: #751472

- Use DefaultDependencies=no in ifup@.service so the service can be started
  as early as possible.
- Create the ifupdown runtime directory in ifup@.service as we can no longer
  rely on the networking service to do that for us.
- Don't stop ifup@.service on shutdown but let the networking service take
  care of stopping all hotplugged interfaces.
- Only start ifup@.service for interfaces configured as allow-hotplug.

This makes them usable under sysvinit as PID 1 without requiring any
symlinks.

This avoids /sbin/init going missing when switching from systemd-sysv to
sysvinit. While at it, add a Replaces: upstart.

Closes: #751589

since this breaks dist-upgrades from wheezy when switching from sysvinit
to systemd-sysv as default init. While downgrading the Pre-Depends in
sysvinit would have been an alternative, dropping the Conflicts and only
keeping the Replaces was deemed the lesser evil.

Closes: #748355

Closes: #746351

Closes: #747741

Patches backported from current upstream.

LP: #1313522

See 6b3ad962

That patch is more general and will go away when we move to newer upstream
versions.

This avoids future diff noise when removing, cherry-picking, and merging
patches. From now on, always use "gbp-pq export --no-patch-numbers" to update
them.

On Dell PowerEdge systems, the iDRAC7 and later support a USB Virtual NIC for
management. Name this interface "idrac" to avoid confusion with "real" network
interfaces.

LP: #1207705

This is necessary for unprivileged LXC containers.

The systemd package should not change kernel policies, at least until it will
become the only supported init system.

This covers smoke-testing logind, hostnamed, timedated, localed, and a
compile/link/run test against libsystemd-login-dev.

They are created by write_net_rules in early boot and need to be copied
to the root file system once it has been remounted read/write.

It's obsolete with devtmpfs (which is required now), and doesn't run with
systemd or upstart anyway.

when migrating the TMPTIME setting from /etc/default/rcS.
Fix up existing broken configurations.

Closes: #738862

Parse /etc/insserv.conf.d content and /etc/insserv.conf and generate systemd
unit drop-in files to add corresponding dependencies. Also ship targets for
the Debian specific $x-display-manager and $mail-transport-agent system
facilities.

Closes: #690892

Packages that need logind functionality should depend on libpam-systemd.

Closes: #742724

The rule which set group floppy for all removable devices has been removed
in the cleanup.