anchor.diff:  
   digest_generation on
   
  -refresh_pattern .		0	50%	8640
  +refresh_pattern .		0	50%	20160
  +refresh_pattern -i tile.openstreetmap.org 60 80% 20160 reload-into-ims
   
   # ZERO required for logrotate to work properly
   logfile_rotate 0
  
positive.code: <% end -%>
  cache_log /var/log/squid/cache.log
  cache_store_log none
  buffered_logs on
  client_db off
  strip_query_terms off
  <% if node[:squid][:version] > 2 -%>
  
negative.code: icp_port 3130
  log_icp_queries off
  
  <% if node[:squid][:version] < 3 -%>
  http_port 80 accel defaultsite=tile.openstreetmap.org tcpkeepalive=60,10,6 http11
  <% else -%>
  