port iptables to new config format, change handling of TITLE and DESCRIPTION

openwrt/package/busybox/Makefile

openwrt/package/iptables/Makefile

openwrt/package/iptables/ipkg/ip6tables.control

openwrt/package/iptables/ipkg/iptables-extra.control

openwrt/package/iptables/ipkg/iptables-mod-conntrack.control

openwrt/package/iptables/ipkg/iptables-mod-extra.control

openwrt/package/iptables/ipkg/iptables-mod-filter.control

openwrt/package/iptables/ipkg/iptables-mod-imq.control

openwrt/package/iptables/ipkg/iptables-mod-ipopt.control

openwrt/package/iptables/ipkg/iptables-mod-ipsec.control

openwrt/package/iptables/ipkg/iptables-mod-nat.control

openwrt/package/iptables/ipkg/iptables-mod-ulog.control

openwrt/package/iptables/ipkg/iptables-utils.control

openwrt/package/iptables/ipkg/iptables.control

openwrt/package/rules.mk