Investigate new way to implement country geo IP blocking

[wwiv]

since nerd.dk is down. See #1576

[wwiv]

Maybe use https://dev.maxmind.com/geoip/geolite2-free-geolocation-data

I think it's a bit more involved since folks will need to either download and use it, or provide an API key to call their server. Their corse grained geo info is more than sufficient for wwiv's needs

It's the same dataset https://freegeoip.io/ uses

[wwiv]

Diamond Dave recommends IP2LOCATION. See http://lite.ip2location.com

[wwiv]

'm wondering is there would be a way to have wwivd query this somehow for geoip...
https://ipapi.is/geolocation.html works too, could just tell folks to download the CSV and parse it on startup.