ported varnish docs

docs/configuring/proxies/varnish.rst

@@ -1,12 +1,16 @@
-To be sure Varnish will work properly with NodeBB check that your configuration ```/etc/varnish/default.vcl``` is optimized for **websockets**.
+Configuring Varnish Cache
+==========================
 
-```varnish
+To be sure Varnish will work properly with NodeBB check that your configuration ``/etc/varnish/default.vcl`` is optimized for **websockets**.
-backend nodebb {
+
+.. code:: 
+
+  backend nodebb {
     .host = "127.0.0.1"; # your nodebb host
     .port = "4567"; # your nodebb port
-}
+  }
 
-sub vcl_recv {
+  sub vcl_recv {
 
     # Pipe websocket connections directly to Node.js
     if (req.http.Upgrade ~ "(?i)websocket") {
@@ -23,12 +27,11 @@ sub vcl_recv {
       return (pass); # don't cache
     }
 
-}
+  }
 
-sub vcl_pipe {
+  sub vcl_pipe {
     # Need to copy the upgrade header
     if (req.http.upgrade) {
       set bereq.http.upgrade = req.http.upgrade;
     }
-}
+  }
-```