More xml fixes

Author: TerjeBr

cookbook/email/dev_environment.rst

@@ -154,9 +154,10 @@ by adding the ``delivery_whitelist`` option:
 
         <swiftmailer:config delivery-address="dev@example.com">
             <!-- all email addresses matching this regex will *not* be redirected to dev@example.com -->
-            <swiftmailer:delivery-whitelist>/@specialdomain.com$/</swiftmailer:delivery-whitelist>
+            <swiftmailer:delivery-whitelist-pattern>/@specialdomain.com$/</swiftmailer:delivery-whitelist-pattern>
+
             <!-- all emails sent to admin@mydomain.com won't be redirected to dev@example.com too -->
-            <swiftmailer:delivery-whitelist>/^admin@mydomain.com$/</swiftmailer:delivery-whitelist>
+            <swiftmailer:delivery-whitelist-pattern>/^admin@mydomain.com$/</swiftmailer:delivery-whitelist-pattern>
         </swiftmailer:config>
 
     .. code-block:: php