mvoe all iptables related code to an own class
mvoe all iptables related code to an own class

to interact with iptables the methodes from this class should be used by
now

ffrgb/ffrn-gw-splash,ffrgb/ffrn-gw-splash,ffrgb/ffrn-gw-splash,Freifunk-Rhein-Neckar/ffrn-gw-splash,Freifunk-Rhein-Neckar/ffrn-gw-splash