Original patch can be found at:
http://www.caraytech.com/geodns/

This patch is a modification to use the GeoIPCityLite database with Bind 9.4.3-P1 views.
Author: Michael Moody
michael (at) gsc (dot) cc

Views should look like this:

view "id" {
      // Match clients from Idaho, California, Texas, and North Carolina
      match-clients { region_ID; region_CA; region_TX; region_NC; };
      recursion no;
      zone "test.com" {
            type master;
            file "test-id.zone";
      };
};

view "az" {
      //Match clients from Arizona
      match-clients { region_AZ; };
      recursion no;
      zone "test.com" {
            type master;
            file "test-az.zone";
      };
};

view "other" {
      // Match all others, necessary for private addresses, and unknown addresses
      match-clients { any; };
      recursion no;
      zone "test.com" {
           type master;
           file "test-other.zone";
      };
};