Connection.features does not need to be confirmed any more, after
commit aa423575, rendering obsolete the workaround when using
TEST_MIRROR (Refs #16885, #17760).

This does remove the requirement to call features.confirm() method
before checking the properties.
Thanks cdestiger and Ramiro Morales for their work on the patch.

Generic views assumed any object's _meta will be model Options. This
is not true for ModelForms for example. Took isinstance(obj, Model)
in use instead.

Added kwargs for_concrete_model and for_concrete_models to ContentType
methods get_for_model() and get_for_models(). By setting the flag to
False, it is possible to get the contenttype for proxy models.

The reason for this was that git show included the whole changeset in
the output, but only the UTC timestamp was needed. By using git log
it is possible to get just the timestamp. The whole changeset can be
large, and can cause unicode encoding errors.

One is for the community, the other for the core team.

Thanks Reinout van Rees for the report.

This avoids adding each contributor as a remote.

Thanks Fruneau for the report.

Many thanks to Daniele Procida.

Fixed #18381 -- Stopped escaping object ids

when passing them to the contenttypes.shortcut view.

Thanks apollo13 for the patch and dhepper for the review.

Fixed #18433 -- Fixed "View on Site" link in inline admin for models with custom PK

Thanks dhepper for the patch and apollo13 for the review.

Thanks ebrelsford AT gmail.com and oinopion.

Thanks Audrey Roy for the patch.

Most of the credit for this large patch goes to Anssi Kääriäinen.
Many thanks to all the people who contributed to the discussion.

Fixed #18432 -- Prevented the ForeignKey field from creating an invalid query when chained. Thanks, Jann Kleen.

Thanks Vinay Sajip for the support of his django3 branch
and Alex Gaynor, kezabelle, YorikSar for the review.

Based on initial patch by Thomas Westfeld

Thanks Vinay Sajip for the support of his django3 branch and
Jannis Leidel for the review.

This commit also changes the string pk to string_pk instead of id, to test
if the admin uses .pk throughout the codebase.

Fixed #18442 -- Invalid locale name in docs.

Thanks Florian Apolloner for the patch.

Fixed #18380 -- Improved installation instructions for MySQLdb.

Thanks sailorfred AT yahoo.com for the report and raulcd
for the initial version of the patch.

This commit includes multiple small related changes, see the ticket
for a full discussion.

Thanks gabrielcw AT gmail.com for the report.

Thanks torkel.bjornson AT gmail.com for the report.

Thanks SmileyChris for the patch.

Tests were still failing with MySQL. It seems a rollback is solving
the issue.