Fine-tune the vhost example.

git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@1792 d4fa192b-c00b-0410-8231-f00ffab90ce4

man/vcl.7

@@ -559,8 +559,9 @@ backend images {
 
 sub vcl_recv {
     if (req.http.host ~ "^(www\.)?example\.com$") {
+        set req.http.host = "www.example.com";
         set req.backend = www;
-    } elsif (req.http.host ~ "^images\.example\.com") {
+    } elsif (req.http.host ~ "^images\.example\.com$") {
         set req.backend = images;
     } else {
         error 404 "Unknown virtual host";