First version of new geoipbackend

 - [x] ipv4 support
 - [x] ipv6 support
 - [x] country code support 
 - [x] config file
 - [x] multi-domain support
 - [x] static record support
 - [x] MX, SRV etc priority support
 - [x] identify what data supports 
 - [x] provide more format specifiers (region, as number, afi)
 - [x] better error handling
 - [x] test suite
 - [x] DNSSEC
 - [x] reload support