Go implementation of a GSLB

This is a homebrew GSLB (Global Server Load Balancer). It uses DNS to route customers to locations based on a combination of their ISP, and the health check status of your sites.

DNS lookups are one way of routing customers to an available resource. Decisions can be made that focus on proximity to the user (in our case, “isp” match);

This is specifically used in the falling-sky project; aka test-ipv6.com.