Fixed #20582 -- Allowed default Form.label_suffix to be translated

Thanks Tim Graham for the review.
Fixed a deprecation warning in a selenium test.
Removed obsolete sentence in queries docs
Removed Python 2.6 references in GIS docs

Refs #20746.
Fixed #20681 -- Prevented teardown_databases from attempting to tear down aliases

Thanks simonpercivall.
Fixes grammatical error in auth docs

Changes "An error will be raise if you try..." to "An error will be raised if you try..."
Merge pull request #1357 from dbinetti/patch-1

Fixed grammatical error in auth docs
Fixed #20746 -- Removed Python 2.6 specific code/docs
Fixed some markup in docs/ref/templates/api.txt
Rephrased the docs for reporting security issues to make it less intimidating.
Merge pull request #1358 from loic/docs

Rephrased the docs for reporting security issues to make it less intimidating.
Reworked docs for ModelForm validation.
Fixed #14007 -- Added model discovery in models module without the need to specify app_label.

Thanks mark@ and Aramgutang for work on the patch.
Fixed #20756 -- Typo in uWSGI docs.
Couple of cleanups in RelatedObjectLookups.js

Thanks George Karpenkov.
Allowed Context.push to behave as a context mananger.

Thanks Loic Bistuer for the review.