anchor.diff:  [2001:0db8:85a3:0000:0000:8a2e:0370:7334]:9301
   ----------------------------------------------------------------
   
  -Host names are allowed instead of IP addresses (similar to 
  +Host names are allowed instead of IP addresses (similar to
   `discovery.zen.ping.unicast.hosts`), and IPv6 addresses must be
  -specified in brackets with the port coming after the brackets. 
  +specified in brackets with the port coming after the brackets.
  
positive.code: [[discovery-file]]
  === File-Based Discovery Plugin
  
  The file-based discovery plugin uses a list of hosts/ports in a `unicast_hosts.txt` file 
  in the `config/discovery-file` directory for unicast discovery.
  
  [[discovery-file-install]]
  
negative.code: `discovery-file` directory to the `config` folder, and a default `unicast_hosts.txt`
  file that must be edited with the correct unicast hosts list before starting the node.
  
  This plugin can be downloaded for <<plugin-management-custom-url,offline install>> from
  {plugin_url}/discovery-file/discovery-file-{version}.zip.
  
  
  [[discovery-file-remove]]
  [float]
  ==== Removal
  