Developer Curb Appeal: Consider supporting Multicast in dev for discovering other nodes

Some distributed search systems default to multicast to make starting up multiple nodes easier for developers.

Obviously there could be downsides to this, and it's not considered a "Best Practice" when doing to production. But it does make setting up your first few nodes more pleasant.

Perhaps this could be tied to the -Dcollection.configName=myConfName so that your nodes don't randomly join other machines on your network.