This update for python-Django to 1.11.15 fixes the following issues:

This security issue was fixed:

- CVE-2018-14574: Prevent open redirect in django.middleware.common.CommonMiddleware (bsc#1102680).

These non-security issues were fixed:

- Fixed WKBWriter.write() and write_hex() for empty polygons on GEOS 3.6.1+
- Fixed a regression that could result in large memory usage when making edits
  using ModelAdmin.list_editable
- Fixed a regression where QuerySet.values() or values_list() after combining
  an annotated and unannotated queryset with union(), difference(), or
  intersection() crashed due to mismatching columns
- Fixed crashes in django.contrib.admindocs when a view is a callable object,
  such as django.contrib.syndication.views.Feed
- Fixed a regression where altering a field with a unique constraint may drop
  and rebuild more foreign keys than necessary
- Fixed a regression where combining two annotated values_list() querysets with
  union(), difference(), or intersection() crashed due to mismatching columns 
- Fixed a regression where an empty choice could be initially selected for the
  SelectMultiple and CheckboxSelectMultiple widgets