Implement Iterator-y traits about rust-netaddr2 HOT 1 CLOSED

It's worth noting that I have been trying to figure out what into_iter() should return. I now think that should be an AddressIterator, since this is what most people would probably want to do.

Then you can do something like:

let net: NetAddr = "127.69.69.42/8";
for address in net {
    // do something with address, which is an IpAddr
}

(and likewise with the Netv4Addr and Netv6Addr types.)

Comparing this to the other two options, the only other one that makes sense would be subnets, but that requires a parameter (what size the subnet is)

from rust-netaddr2.