anchor.diff:  #   get errors about IP-forwarding you must set them to have individual
   #   names with this setting.
   #Default:
  -# visible_hostname localhost<% if visible_hostname != :undef %>
  -visible_hostname <%= visible_hostname %><% end %>
  +# visible_hostname localhost<% if @visible_hostname %>
  +visible_hostname <%= @visible_hostname %><% end %>
   
   #  TAG: unique_hostname
   #   If you want to have multiple machines with the same
  
positive.code: #   and http://fog.hpl.external.hp.com/techreports/98/HPL-98-173.html.
  #Default:
  # cache_replacement_policy lru
  cache_replacement_policy <%= cache_replacement_policy %>
  
  #  TAG: cache_dir
  #   Usage:
  
negative.code: #   objects.
  #Default:
  # cache_mem 256 MB
  cache_mem <%= @cache_mem %>
  
  #  TAG: maximum_object_size_in_memory   (bytes)
  #   Objects greater than this size will not be attempted to kept in
  