[1.8.x] Fixed #26309 -- Documented that login URL settings no longer support dotted paths.

Backport of 2404d209a5 from master

docs/internals/deprecation.txt

@@ -34,6 +34,9 @@ details on these changes.
 * The ability to :func:`~django.core.urlresolvers.reverse` URLs using a dotted
   Python path will be removed.
 
+* The ability to use a dotted Python path for the ``LOGIN_URL`` and
+  ``LOGIN_REDIRECT_URL`` settings will be removed.
+
 * Support for :py:mod:`optparse` will be dropped for custom management commands
   (replaced by :py:mod:`argparse`).
 

docs/ref/settings.txt

@@ -2866,9 +2866,14 @@ The URL where requests are redirected after login when the
 This is used by the :func:`~django.contrib.auth.decorators.login_required`
 decorator, for example.
 
-This setting also accepts view function names and :ref:`named URL patterns
-<naming-url-patterns>` which can be used to reduce configuration duplication
-since you don't have to define the URL in two places (``settings`` and URLconf).
+This setting also accepts :ref:`named URL patterns <naming-url-patterns>` which
+can be used to reduce configuration duplication since you don't have to define
+the URL in two places (``settings`` and URLconf).
+
+.. deprecated:: 1.8
+
+    The setting may also be a dotted Python path to a view function. Support
+    for this will be removed in Django 1.10.
 
 .. setting:: LOGIN_URL
 
@@ -2880,18 +2885,14 @@ Default: ``'/accounts/login/'``
 The URL where requests are redirected for login, especially when using the
 :func:`~django.contrib.auth.decorators.login_required` decorator.
 
-This setting also accepts view function names and :ref:`named URL patterns
-<naming-url-patterns>` which can be used to reduce configuration duplication
-since you don't have to define the URL in two places (``settings`` and URLconf).
+This setting also accepts :ref:`named URL patterns <naming-url-patterns>` which
+can be used to reduce configuration duplication since you don't have to define
+the URL in two places (``settings`` and URLconf).
 
-.. setting:: LOGOUT_URL
+.. deprecated:: 1.8
 
-LOGOUT_URL
-----------
-
-Default: ``'/accounts/logout/'``
-
-LOGIN_URL counterpart.
+    The setting may also be a dotted Python path to a view function. Support
+    for this will be removed in Django 1.10.
 
 .. setting:: PASSWORD_RESET_TIMEOUT_DAYS
 

docs/releases/1.8.txt

@@ -1357,6 +1357,9 @@ to ensure compatibility when reversing by Python path is removed in Django 1.10.
 Similarly for GIS sitemaps, add ``name='django.contrib.gis.sitemaps.views.kml'``
 or ``name='django.contrib.gis.sitemaps.views.kmz'``.
 
+If you are using a Python path for the :setting:`LOGIN_URL` or
+:setting:`LOGIN_REDIRECT_URL` setting, use the name of the ``url()`` instead.
+
 .. _security issue: https://www.djangoproject.com/weblog/2014/apr/21/security/#s-issue-unexpected-code-execution-using-reverse
 
 Aggregate methods and modules