if ! grep -q /etc/firewall.freifunk /etc/config/firewall; then
uci add firewall include >/dev/null
uci set firewall.@include[-1].path=/etc/firewall.freifunk
if ! grep -q /etc/firewall.freifunk /etc/config/firewall; then
uci add firewall include >/dev/null
uci set firewall.@include[-1].path=/etc/firewall.freifunk