[3.0] e43966d escape \0

[Tollef Fog Heen]

commit e43966d7c8516b6d5b49d4084cc38b4fbcdc56a0
Author: Per Buer <perbu at varnish-software.com>
Date:   Wed Apr 4 10:17:01 2012 +0200

    escape \0

diff --git a/doc/sphinx/reference/vcl.rst b/doc/sphinx/reference/vcl.rst
index 01d783f..212cd2b 100644
--- a/doc/sphinx/reference/vcl.rst
+++ b/doc/sphinx/reference/vcl.rst
@@ -420,7 +420,7 @@ hash_data(str)
 
 regsub(str, regex, sub)
   Returns a copy of str with the first occurrence of the regular 
-  expression regex replaced with sub. Within sub, \0 (which can 
+  expression regex replaced with sub. Within sub, \\0 (which can 
   also be spelled &) is replaced with the entire matched string, 
   and \n is replaced with the contents of subgroup n in the 
   matched string.