ip.isPrivate not contain all private ips

[tangxinfa]

I encountered a private ip prefix with 100.64, and i found some ip address region not include in your code: https://en.wikipedia.org/wiki/Reserved_IP_addresses

[littleskunk]

0.0.0.0 is missing but the IPv6 equivalent :: is there. I will open a pull request for this one. 100.64 is to hot for me. I don't know that range and even wikipedia don't need to be correct. I will leave that one for you and fix only the ip that I know for sure.