Fixed #18993 -- 'django' logger logs to console when DEBUG=True

Thanks Preston Holmes for the review.

docs/topics/logging.txt

@@ -546,6 +546,13 @@ logging module.
             }
         },
 
+.. class:: RequireDebugTrue()
+
+   .. versionadded:: 1.5
+
+   This filter is similar to :class:`RequireDebugFalse`, except that records are
+   passed only when :setting:`DEBUG` is `True`.
+
 .. _default-logging-configuration:
 
 Django's default logging configuration
@@ -555,5 +562,14 @@ By default, Django configures the ``django.request`` logger so that all messages
 with ``ERROR`` or ``CRITICAL`` level are sent to :class:`AdminEmailHandler`, as
 long as the :setting:`DEBUG` setting is set to ``False``.
 
-All messages reaching the ``django`` catch-all logger are discarded
-(sent to ``NullHandler``).
+All messages reaching the ``django`` catch-all logger when :setting:`DEBUG` is
+`True` are sent ot the console. They are simply discarded (sent to
+``NullHandler``) when :setting:`DEBUG` is `False`.
+
+.. versionchanged:: 1.5
+
+    Before Django 1.5, all messages reaching the ``django`` logger were
+    discarded, regardless of :setting:`DEBUG`.
+
+See also :ref:`Configuring logging <configuring-logging>` to learn how you can
+complement or replace this default logging configuration.