rs/zkfarmer — pull request #27 by vincentbernat (2013-10-01 16:34:23+00:00)
Title: joiner: add an option to work with a common node

In normal operations, each joiner will have its own zookeeper node. We
add an option to make them work on a common node instead. The hostname
is not added to the node and local modifications are not
authoritative. Moreover, the node is not ephemeral.