"Revert "Added config example for Varnish 4.0"""

This reverts commit 23afdb3.

We thought we had the issue fixed, but apparently not quite yet - see #4280

Author: weaverryan

cookbook/cache/varnish.rst

@@ -54,62 +54,30 @@ Then, optimize Varnish so that it only parses the Response contents when there
 is at least one ESI tag by checking the ``Surrogate-Control`` header that
 Symfony adds automatically:
 
-.. configuration-block::
+.. code-block:: text
 
-    .. code-block:: varnish4
+    sub vcl_fetch {
+        /*
+        Check for ESI acknowledgement
+        and remove Surrogate-Control header
+        */
+        if (beresp.http.Surrogate-Control ~ "ESI/1.0") {
+            unset beresp.http.Surrogate-Control;
 
-         /* (https://www.varnish-cache.org/docs/4.0/whats-new/upgrading.html#req-not-available-in-vcl-backend-response) */
-        sub vcl_backend_response {
-            // Check for ESI acknowledgement and remove Surrogate-Control header
-            if (beresp.http.Surrogate-Control ~ "ESI/1.0") {
-                unset beresp.http.Surrogate-Control;
-                set beresp.do_esi = true;
-            }
-            /* By default Varnish ignores Pragma: nocache
-            (https://www.varnish-cache.org/docs/4.0/users-guide/increasing-your-hitrate.html#cache-control)
-            so in order avoid caching it has to be done explicitly */
-            if (beresp.http.Pragma ~ "no-cache") {
-                // https://www.varnish-cache.org/docs/4.0/whats-new/upgrading.html#hit-for-pass-objects-are-created-using-beresp-uncacheable
-                set beresp.uncacheable = true;
-                set beresp.ttl = 120s;
-                return (deliver);
-            }
+            // For Varnish >= 3.0
+            set beresp.do_esi = true;
+            // For Varnish < 3.0
+            // esi;
         }
-
-    .. code-block:: varnish3
-
-        sub vcl_fetch {
-            // Check for ESI acknowledgement and remove Surrogate-Control header
-            if (beresp.http.Surrogate-Control ~ "ESI/1.0") {
-                unset beresp.http.Surrogate-Control;
-                set beresp.do_esi = true;
-            }
-            /* By default Varnish ignores Cache-Control: nocache
-            (https://www.varnish-cache.org/docs/3.0/tutorial/increasing_your_hitrate.html#cache-control),
-            so in order avoid caching it has to be done explicitly */
-            if (beresp.http.Pragma ~ "no-cache" ||
-                beresp.http.Cache-Control ~ "no-cache" ||
-                beresp.http.Cache-Control ~ "private") {
-                return (hit_for_pass);
-            }
-        }
-
-    .. code-block:: varnish2
-
-        sub vcl_fetch {
-            // Check for ESI acknowledgement and remove Surrogate-Control header
-            if (beresp.http.Surrogate-Control ~ "ESI/1.0") {
-                unset beresp.http.Surrogate-Control;
-                esi;
-            }
-            /* By default Varnish ignores Cache-Control: nocache
-            so in order avoid caching it has to be done explicitly */
-            if (beresp.http.Pragma ~ "no-cache" ||
-                beresp.http.Cache-Control ~ "no-cache" ||
-                beresp.http.Cache-Control ~ "private") {
-                return (hit_for_pass);
-            }
+        /* By default Varnish ignores Cache-Control: nocache
+        (https://www.varnish-cache.org/docs/3.0/tutorial/increasing_your_hitrate.html#cache-control),
+        so in order avoid caching it has to be done explicitly */
+        if (beresp.http.Pragma ~ "no-cache" ||
+             beresp.http.Cache-Control ~ "no-cache" ||
+             beresp.http.Cache-Control ~ "private") {
+            return (hit_for_pass);
         }
+    }
 
 .. caution::