dnsmasq: apply patch from upstream

original commit message: RFC6771 does not exclude the forwarding of the example domain as it states : "Caching DNS servers SHOULD NOT recognize example names as special and SHOULD resolve them normally." Example domains cannot be assigned to any user or person by DNS registrars as they're registered in perpetuity to IANA meaning they can be resolved; therefore let's remove the example domains from the rfc6761.conf file