bugfix: determine ipv6 forwarding from user forwarding + ipv6 configuration
bugfix: determine ipv6 forwarding from user forwarding + ipv6 configuration

Signed-off-by: Dominik Richter <b7323add517e187efe0283b76511b7ed762bfe13@gmail.com>

dupuy/chef-os-hardening,creativemarket/chef-os-hardening,mikemoate/chef-os-hardening,mikemoate/chef-os-hardening,patcon/chef-os-hardening,creativemarket/chef-os-hardening,hardening-io/chef-os-hardening,waz128/os-hardening,dupuy/chef-os-hardening,hardening-io/chef-os-hardening,rollbrettler/chef-os-hardening,8x8Cloud/chef-os-hardening,patcon/chef-os-hardening,rollbrettler/chef-os-hardening,8x8Cloud/chef-os-hardening