Hi Simon

Here is a patch against dnsmasq 2.39 which provides support for LOC  
entries in order to assign location information to dns records  
(rfc1876). I tested it on OSX and on OpenWRT.

Cheers
Lorenz

More info:
http://www.ckdhr.com/dns-loc/
http://www.faqs.org/rfcs/rfc1876.html
