country_code_by_name_v6 does not work if hostname doesn't have an IPv6 address

[csware]

country_code_by_name_v6 does not work if hostname doesn't have an IPv6 address. if this is the case the IPv4 address should be transparently converted to an IPv6 address (e.g. "::ffff:IPv4" in order to make the lookup work as expected).

[oschwald]

Thanks for the suggestion. I would suggest taking a look at our GeoIP2 API, which automatically handles IPv4 addresses in the way that you describe.