Is your feature request related to a problem? Please describe.
In some area of the world, maxmind geoip database download is very slow and fails often.

Describe the solution you'd like
I'd like to have a config line in config.yml to override the geoip database download URL so I can point it to our local mirror HTTP server.

Describe alternatives you've considered
Use some other script to download the database prior to minecraft server launch. This seems hacky and requires a restart of the server.

Additional context
EssentialsGeoIP implements a similar workaround.