Fixed #19779 -- Checked contrib.sites presence in RedirectFallbackMiddleware

Thanks Aymeric Augustin for the report and directions for the patch.

1 files changed, 6 insertions, 0 deletions

diff --git a/docs/releases/1.5.txt b/docs/releases/1.5.txt
index a5ce08aed6..33dcb0e794 100644
--- a/docs/releases/1.5.txt
+++ b/docs/releases/1.5.txt
@@ -653,6 +653,12 @@ Miscellaneous
   Attempting to load it with ``{% load adminmedia %}`` will fail. If your
   templates still contain that line you must remove it.
 
+* Because of an implementation oversight, it was possible to use
+  :doc:`django.contrib.redirects </ref/contrib/redirects>` without enabling
+  :doc:`django.contrib.sites </ref/contrib/sites>`. This isn't allowed any
+  longer. If you're using ``django.contrib.redirects``, make sure
+  :setting:``INSTALLED_APPS`` contains ``django.contrib.sites``.
+
 Features deprecated in 1.5
 ==========================