Sebastien Coutu

Update DNS discovery to better match ETCD documentation.

4

Hi, I've made a little change to better match the documentation available [here](https://coreos.com/etcd/docs/latest/v2/clustering.html#dns-discovery). It will now search for __etcd-client._tcp.domain_ instead of __etcd._tcp.domain_. I did not had time to implement searching...

We've recently migrated to kong 0.10.x and will be upgrading shortly up to the latest version. Since the API section has changed quite a bit, I've ported the module to...