debian: Always enable multi-arch

With the new system, this should be supported everywhere.

Signed-off-by: Gergely Nagy <algernon@balabit.hu>
debian/rules: Use dh_auto_configure in the override

Use dh_auto_configure in the override, so that multi-arch stuff gets
passed along properly.

Signed-off-by: Gergely Nagy <algernon@balabit.hu>
debian/tools: Fix update-control.sh

There was still a reference to debian/control.d/default, drop it.

Signed-off-by: Gergely Nagy <algernon@balabit.hu>
debian: Proper systemd support via dh-systemd

Build-Depend on dh-systemd (>= 1.3) aswell, when systemd support is
enabled, drop debian/control.d/systemd, and make the systemd parts much
less obtrusive.

Heavily based on a patch by  Michael Biebl <biebl@debian.org>.

Closes: Debian #713982, Debian #690067
Signed-off-by: Gergely Nagy <algernon@balabit.hu>
debian: Bump Standards-Version to 3.9.4.

Signed-off-by: Gergely Nagy <algernon@balabit.hu>
debian: Drop the libsyslog-ng-* packages

Move the main shared library into syslog-ng-core, it is a private
library anyway. Also rename the libsyslog-ng-dev package to
syslog-ng-dev accordingly.

Signed-off-by: Gergely Nagy <algernon@balabit.hu>
debian/rules: Fix the module packaging bits

Fix dh_makeshlibs, so that modules can be properly built and all that.

Signed-off-by: Gergely Nagy <algernon@balabit.hu>
.gitignore: Ignore /debian/syslog-ng-dev/

Signed-off-by: Gergely Nagy <algernon@balabit.hu>
debian/tools/export-source.sh: Make EXPORT_ROOT configurable

Signed-off-by: Gergely Nagy <algernon@balabit.hu>