Fixed documentation of disable_constraint_checking

The docstring and base implementation of disable_constraint_checking do not indicate that a return value is expected for proper behavior.
#20432: Fix for GroupAdmin test
Fixed #20432 -- Test failure in admin_views.

The failure was triggered by a cache leak.
Fixed #20386 - Introspection problem on Oracle

Made introspection always return a unicode as column name on Oracle.
Thanks aaugustin for review and suggestion to use force_text().
Fixed #20433: Extract catalog compilation code from javascript_catalog view.
Merge pull request #1090 from zyegfryed/ticket_20433

Fixed #20433: extracted catalog compilation code from view.
Made test introduced in 566e284c pass on Python 3.
Fixed #11160 - Ensure full_clean is called from non_form_errors

Updated FormSet.non_form_errors() to ensure full_clean() has
been called before returning the errors.
Added myself to AUTHORS
Fixed #20402: removed as-limit from uWSGI example.

It can fail in hard-to-diagnose ways.
Fixed #20235 -- Use self.object_list if object_list not present in get_context_data kwargs.

This is so MultipleObjectMixin can be used in the same way as
SingleObjectMixin.
Fixed #13546 -- Easier handling of localize field options in ModelForm
Merge pull request #1083 from Markush2010/ticket20235

Fixes #20235 - MultipleObjectMixin requires object_list in kwargs
Merge pull request #1084 from erikr/master

Fixed #13546 -- Easier handling of localize field options in ModelForm
Added example of using sitemaps with static views.

References #16829.
Fixed #20269 -- Adapted PostGIS template create script for CentOS/RHEL

Thanks Stephane Benchimol for the report and the initial script and
mfandreas for the patch.
Fixes #19919: get_language_from_request() disregards "en-us" and "en" languages
when matching Accept-Language
Fixed argument order for localized_fields to ensure backwards compatibility
Merge pull request #1100 from ambv/issue19919

Fixed #19919: get_language_from_request() disregards en-us and en
Merge pull request #1101 from erikr/master

Fixed argument order for localized_fields to ensure backwards compatibility