anchor.diff:  # different interval, or to listen to another port, and so on.
   #
   # slaveof <masterip> <masterport>
  -<% unless node["redis"].fetch("slaveof", "").empty? %>
  +<% if node["redis"]["slaveof"] && !node["redis"]["slaveof"].empty? %>
   slaveof <%= node["redis"]["slaveof"] %>
   <% end %>
   
  
positive.code: # refuse the slave request.
  #
  # masterauth <master-password>
  <% unless node["redis"].fetch("masterauth", "").empty? %>
  masterauth <%= node["redis"]["masterauth"] %>
  <% end %>
  
  
negative.code: # use a very strong password otherwise it will be very easy to break.
  #
  # requirepass foobared
  <% if node["redis"]["requirepass"] && !node["redis"]["requirepass"].empty? %>
  requirepass <%= node["redis"]["requirepass"] %>
  <% end %>
  
  