anchor.diff:    .host = "<%= @varnish_backend_address -%>";
     .port = "8080";
     .probe = {
  -    .request = "HEAD / HTTP/1.1" "Connection: close";
  +    .request = "HEAD / HTTP/1.0" "Connection: close";
       .threshold = 1;
       .window = 2;
       .timeout = 5s;
  
positive.code:   .host = "<%= @varnish_backend_address -%>";
    .port = "8081";
    .probe = {
      .request = "HEAD / HTTP/1.1" "Connection: close";
      .threshold = 1;
      .window = 2;
      .timeout = 5s;
  
negative.code:   .host = "<%= @varnish_backend_address -%>";
    .port = "8082";
    .probe = {
      .request = "HEAD / HTTP/1.0" "Connection: close";
      .threshold = 1;
      .window = 2;
      .timeout = 5s;
  