[2.0.x] Updated various links in docs to use HTTPS.

Backport of 7c81b28ebc from master

docs/ref/contrib/gis/feeds.txt

@@ -11,7 +11,7 @@ in RSS/Atom feeds formatted according to either the `Simple GeoRSS`__ or
 Django's, please consult :doc:`Django's syndication documentation
 </ref/contrib/syndication>` for details on general usage.
 
-.. _W3C Geo: http://www.w3.org/2003/01/geo/
+.. _W3C Geo: https://www.w3.org/2003/01/geo/
 
 __ http://georss.org/simple.html
 

docs/ref/contrib/gis/forms-api.txt

@@ -9,7 +9,7 @@ GeoDjango provides some specialized form fields and widgets in order to visually
 display and edit geolocalized data on a map. By default, they use
 `OpenLayers`_-powered maps, with a base WMS layer provided by `NASA`_.
 
-.. _OpenLayers: http://openlayers.org/
+.. _OpenLayers: https://openlayers.org/
 .. _NASA: https://earthdata.nasa.gov/
 
 Field arguments

docs/ref/contrib/gis/functions.txt

@@ -171,7 +171,7 @@ Keyword Argument       Description
                        representation -- the default value is 8.
 =====================  =====================================================
 
-__ http://www.w3.org/Graphics/SVG/
+__ https://www.w3.org/Graphics/SVG/
 
 ``Azimuth``
 ===========

docs/ref/contrib/gis/geoip2.txt

@@ -19,7 +19,7 @@ that ``geoip2`` can leverage the C library's faster speed.
 
 __ https://geoip2.readthedocs.io/
 __ https://pypi.python.org/pypi/geoip2
-__ http://dev.maxmind.com/geoip/geoip2/geolite2/
+__ https://dev.maxmind.com/geoip/geoip2/geolite2/
 __ https://github.com/maxmind/libmaxminddb
 
 Example

docs/ref/contrib/gis/geoquerysets.txt

@@ -864,4 +864,4 @@ Example::
 .. rubric:: Footnotes
 .. [#fnde9im] *See* `OpenGIS Simple Feature Specification For SQL <http://www.opengis.org/docs/99-049.pdf>`_, at Ch. 2.1.13.2, p. 2-13 (The Dimensionally Extended Nine-Intersection Model).
 .. [#fnsdorelate] *See* `SDO_RELATE documentation <https://docs.oracle.com/database/121/SPATL/sdo_relate.htm#SPATL1039>`_, from the Oracle Spatial and Graph Developer's Guide.
-.. [#fncovers] For an explanation of this routine, read `Quirks of the "Contains" Spatial Predicate <http://lin-ear-th-inking.blogspot.com/2007/06/subtleties-of-ogc-covers-spatial.html>`_ by Martin Davis (a PostGIS developer).
+.. [#fncovers] For an explanation of this routine, read `Quirks of the "Contains" Spatial Predicate <https://lin-ear-th-inking.blogspot.com/2007/06/subtleties-of-ogc-covers-spatial.html>`_ by Martin Davis (a PostGIS developer).

docs/ref/contrib/gis/install/index.txt

@@ -225,7 +225,7 @@ __ https://www.python.org/ftp/python/
 Postgres.app
 ~~~~~~~~~~~~
 
-`Postgres.app <http://postgresapp.com/>`_ is a standalone PostgreSQL server
+`Postgres.app <https://postgresapp.com/>`_ is a standalone PostgreSQL server
 that includes the PostGIS extension. You will also need to install ``gdal`` and
 ``libgeoip`` with :ref:`homebrew`.
 
@@ -299,8 +299,8 @@ your ``.profile`` to be able to run the package programs from the command-line::
     export PATH=/Library/Frameworks/GDAL.framework/Programs:$PATH
     export PATH=/usr/local/pgsql/bin:$PATH
 
-__ http://www.kyngchaos.com/software/frameworks
-__ http://www.kyngchaos.com/software/postgres
+__ https://www.kyngchaos.com/software/frameworks
+__ https://www.kyngchaos.com/software/postgres
 
 .. _psycopg2_kyngchaos:
 

docs/ref/contrib/gis/tutorial.txt

@@ -745,7 +745,7 @@ you just created. Browse to any of the ``WorldBorder`` entries -- the borders
 may be edited by clicking on a polygon and dragging the vertexes to the desired
 position.
 
-.. _OpenLayers: http://openlayers.org/
+.. _OpenLayers: https://openlayers.org/
 .. _Open Street Map: https://www.openstreetmap.org/
 .. _Vector Map Level 0: http://earth-info.nga.mil/publications/vmap0.html
 .. _OSGeo: http://www.osgeo.org

docs/ref/contrib/staticfiles.txt

@@ -355,9 +355,9 @@ mentioned above. Feel free to override this method to use your own
 hashing algorithm.
 
 .. _`far future Expires headers`: https://developer.yahoo.com/performance/rules.html#expires
-.. _`@import`: http://www.w3.org/TR/CSS2/cascade.html#at-import
-.. _`url()`: http://www.w3.org/TR/CSS2/syndata.html#uri
-.. _`Cascading Style Sheets`: http://www.w3.org/Style/CSS/
+.. _`@import`: https://www.w3.org/TR/CSS2/cascade.html#at-import
+.. _`url()`: https://www.w3.org/TR/CSS2/syndata.html#uri
+.. _`Cascading Style Sheets`: https://www.w3.org/Style/CSS/
 
 ``CachedStaticFilesStorage``
 ----------------------------

docs/ref/contrib/syndication.txt

@@ -942,7 +942,7 @@ They share this interface:
 
     All parameters should be strings, except ``categories``, which should be a
     sequence of strings. Beware that some control characters
-    are `not allowed <http://www.w3.org/International/questions/qa-controls>`_
+    are `not allowed <https://www.w3.org/International/questions/qa-controls>`_
     in XML documents. If your content has some of them, you might encounter a
     :exc:`ValueError` when producing the feed.
 

docs/ref/middleware.txt

@@ -378,7 +378,7 @@ in the :setting:`SECURE_REDIRECT_EXEMPT` setting.
     Django can't seem to tell when a request actually is already secure, you
     may need to set the :setting:`SECURE_PROXY_SSL_HEADER` setting.
 
-.. _nginx: http://nginx.org
+.. _nginx: https://nginx.org
 
 Session middleware
 ------------------

docs/ref/request-response.txt

@@ -951,7 +951,7 @@ Without passing ``safe=False``, a :exc:`TypeError` will be raised.
 .. warning::
 
     Before the `5th edition of ECMAScript
-    <http://www.ecma-international.org/ecma-262/5.1/index.html#sec-11.1.4>`_
+    <https://www.ecma-international.org/ecma-262/5.1/index.html#sec-11.1.4>`_
     it was possible to poison the JavaScript ``Array`` constructor. For this
     reason, Django does not allow passing non-dict objects to the
     :class:`~django.http.JsonResponse` constructor by default.  However, most

docs/ref/templates/language.txt

@@ -28,7 +28,7 @@ or Jinja2_, you should feel right at home with Django's templates.
     </howto/custom-template-tags>` to the template language as needed).
 
 .. _`The Django template language: For Python programmers`: ../templates_python/
-.. _Smarty: http://www.smarty.net/
+.. _Smarty: https://www.smarty.net/
 .. _Jinja2: http://jinja.pocoo.org/
 
 Templates