Bump Build-Depends on debhelper accordingly.

Conflicts:

	debian/changelog

The boot and shutdown messages just looked weird:
 Starting Start ifup for %I
 ...
 Stopping Start ifup for %I

Was missed in cce644d34bd5015b4caf1756a1db827c167e51c9

Conflicts:

	debian/changelog

and try to cleanup /lib/init/rw in postinst. Bump dependency on
initscripts accordingly. Closes: #643699

if systemd is not running by checking for /sys/fs/cgroup/systemd before
executing systemctl. Closes: #642749

Conflicts:

	debian/changelog

systemd 43

https://bugzilla.redhat.com/show_bug.cgi?id=790260

This introduces the new PAM environment variable XDG_SESSION_CLASS. If
not set, defaults to "user".

This is useful for apps that want to distuingish real user logins from
"fake" ones which just exist to show a gdm login screen or a lock
screen.

The new protocol specified that we are settling on is "unixexec:" rather
than just "exec:", hence let's update our code accordingly.

https://bugs.freedesktop.org/show_bug.cgi?id=35230

sd-login: if NULL or 0 is passed as first parameter of the sd_xxx functions, work on objects of the calling process

man: it's probably a good idea to wrap the ANSI color in quotes, in order to allow proper shell parsing of the semicolon

The text mode welcome message will only show the distro name stored
in /etc/os-release and no longer read any distro-specific files.  If
/etc/os-release does not exist, 'Linux' will be printed.

When the source tree is is ./configure'd, only /etc-os-release is read
to guess the distro to build for. If /etc/os-release does not exist,
--with-distro= needs to be specified.

The LSB X-Interactive support turned out to be broken and has been
removed upstream so we no longer need any special handling for those
type of services.