In some cases a distribution may want to install rules file into a
location other than /etc/iptables/ so introduce custom recipe-level
IPTABLES_RULES_DIR parameter which allows conveniently overriding
the rules directory location.
Signed-off-by: Niko Mauno <niko.mauno@iki.fi> Signed-off-by: Ross Burton <ross.burton@intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>