anchor.diff:  #
   # module nginx
   
  -upstream <%= define_servername %> {
  +upstream <%= server_name %> {
       server      <%= upstream %> fail_timeout=0;
   }
   
  
positive.code:     listen      <%= define_port %>;
      server_name <%= server_name %><% server_aliases.each do |val| -%> <%= val %><% end -%>;
  
      access_log          /var/log/nginx/<%= define_servername %>.access.log;
      error_log           /var/log/nginx/<%= define_servername %>.error.log;
  
      root                <%= root_dir %>;
  
  
negative.code:         proxy_redirect off;       
  
          if (!-f $request_filename) {
              proxy_pass http://<%= server_name %>;
              break;
          }
      }
  