Nftables should be preferred over iptables if available, which
NetworkManager will do if both paths are set.
Signed-off-by: Fiona Klute (WIWA) <fiona.klute@gmx.de>
Signed-off-by: Julien Olivain <ju.o@free.fr>
(cherry picked from commit 7c8cca9baa)
Signed-off-by: Thomas Perale <thomas.perale@mind.be>