sf2.2 note: _method override disabled by default

Author: mattattui

cookbook/routing/method_parameters.rst

@@ -4,6 +4,11 @@
 How to use HTTP Methods beyond GET and POST in Routes
 =====================================================
 
+.. versionadded:: 2.2
+    This functionality is disabled by default in Symfony 2.2. To enable it, 
+    you must call ``Request::enableHttpMethodParameterOverride()`` before you
+    handle the request.
+
 The HTTP method of a request is one of the requirements that can be checked
 when seeing if it matches a route. This is introduced in the routing chapter
 of the book ":doc:`/book/routing`" with examples using GET and POST. You can