WAN - 6in4 tunnel - allow saving without routed IPv6 prefix
Followup of turris/foris-controller/foris-controller#170 (closed)
Update form validation so that Routed IPv6 prefix is not mandatory.
Followup of turris/foris-controller/foris-controller#170 (closed)
Update form validation so that Routed IPv6 prefix is not mandatory.