Firewall: minor validation issue (ipv6-icmp inet), closes https://github.com/opnsense/core/issues/4493
Firewall: minor validation issue (ipv6-icmp inet), closes https://github.com/opnsense/core/issues/4493

opnsense/core,opnsense/core,opnsense/core,opnsense/core,opnsense/core,opnsense/core