[44net] Proposal on using the "Radio" flag

In light of what was discussed here, I would propose the following usage of the "radio" flag: A subnet marked as "Radio" should use this flag exclusively and inherit the Tunnel or BGP flag from its parent network. For allocation only purposes only, a network without any flags is enough. Rationale: A pure radio network doesn't exist from the point of view of ampr-net since it would not present any internet connectivity. If this connectivity is present, meaning it is reachable by any kind of means, IPIP or BGP routed, it will allow a connectivity method, the same as its parent network. 73s, Marius, YO2LOJ