Restored some content deleted by mistake

Author: javiereguiluz

reference/dic_tags.rst

@@ -483,6 +483,9 @@ classes into any of those events.
 For a full example of this listener, read the :doc:`/cookbook/event_dispatcher/event_listener`
 cookbook entry.
 
+For another practical example of a kernel listener, see the cookbook
+article: :doc:`/cookbook/request/mime_type`.
+
 Core Event Listener Reference
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~