[3.0] 6ecde6d Showcase !~ in the regex example

[Tollef Fog Heen]

commit 6ecde6d1d5434c54e4ba81bbf94e380501c40048
Author: Per Buer <perbu at varnish-software.com>
Date:   Wed Aug 22 09:13:36 2012 +0200

    Showcase !~ in the regex example

diff --git a/doc/sphinx/reference/vcl.rst b/doc/sphinx/reference/vcl.rst
index 927f640..c4b4f96 100644
--- a/doc/sphinx/reference/vcl.rst
+++ b/doc/sphinx/reference/vcl.rst
@@ -404,7 +404,8 @@ insensitivity* add the flag within parens following a question mark,
 like this:
 ::
 
-  if (req.http.host ~ "(?i)example.com$") {
+  # If host is NOT example dot com..
+  if (req.http.host !~ "(?i)example.com$") {
           ...
   }