Unable to stop or reload iptables daemon with iptables-1.8.9-r4

Once a system is upgraded to iptables-1.8.9-r4 and rebooted, rc-service iptables stop and rc-service iptables reload no longer work. This is due to the checkkernel() function in /etc/init.d/iptables checking for presence of /proc/net/ip_tables_names which is not present if using the nftables back end, as used by iptables-1.8.9-r4. The iptables command itself still functions, as does rc-srvice iptables save, allowing a limited amount of iptables use.