netconfig is often found on openSUSE, SUSE, and derivative distributions.
You can disable netconfig’s handling of /etc/resolv.conf by disabling the NETCONFIG_DNS_POLICY option in /etc/sysconfig/network/config to an empty string as shown below.
NETCONFIG_DNS_POLICY=""
Afterward, you should delete the netconfig-generated resolv.conf file, and reboot the system.
rm /etc/resolv.conf reboot