anchor.diff:  [[unicast]]
   ===== Unicast
   
  -The unicast discovery allows to perform the discovery when multicast is
  +The unicast discovery allows for discovery when multicast is
   not enabled. It basically requires a list of hosts to use that will act
   as gossip routers. It provides the following settings with the
   `discovery.zen.ping.unicast` prefix:
  
positive.code: 
  As part of the initial ping process a master of the cluster is either
  elected or joined to. This is done automatically. The
  `discovery.zen.ping_timeout` (which defaults to `3s`) allows to
  configure the election to handle cases of slow or congested networks
  (higher values assure less chance of failure). Once a node joins, it
  will send a join request to the master (`discovery.zen.join_timeout`)
  with a timeout defaulting at 20 times the ping timeout.
  
negative.code: 
  This is the process where a node uses the discovery mechanisms to find
  other nodes. There is support for both multicast and unicast based
  discovery (these mechanisms can be used in conjunction as well).
  
  [float]
  [[multicast]]
  ===== Multicast
  
  Multicast ping discovery of other nodes is done by sending one or more
  multicast requests which existing nodes will receive and
  respond to. It provides the following settings with the
  `discovery.zen.ping.multicast` prefix:
  
  