Moved ServerHandler helper class to tests.

It has been only used in the builtin_servers tests since Django 1.4.
Fixed #19195 -- Allow explicit ordering by a relation `_id` field.

Thanks to chrisedgemon for the report and shaib, akaariai and
timgraham for the review.
Fixed #22485: Include all unmigrated apps in project state by default.
Fixed #22546 -- Removed idioms in tutorial 2.

Thanks bjb at sourcerer.ca for the suggestion.
Cleanup failing test w/contenttypes and remove useless graph load
Fixed #22547 -- Added some links to tutorial 2.

Thanks bjb at sourcer.ca for the suggestion.
flake8 fixes.
Fixed #22539 -- Copied exclude argument in Model.full_clean() to prevent side effects.
Fixed #22551 -- Made oracle backend method Python 3 compatible

Thanks fatal10110 at gmail.com for the report. The fix is 1.6-only
because that code has been refactored in 1.7 (6983201cfb).
'Docs-only' forward port of 120a98120 from 1.6.x.
Fix migration autodector to work correctly with custom deconstructed values
Fixed #22558 -- Added missing word in contributing docs
Fixed #22540 -- Made _create_object_from_params() call create()

So as the save step is centralized in create(), especially useful
when customizing behavior in subclasses.
Thanks craig.labenz@gmail.com for the report.
Fixed clash caused by the newly introduced -e shorthand for makemessages --exclude.

This fixes a regression caused by 0707b82. Refs #22328.
Fixed #22565 -- Prevented pgettext_lazy crash with bytestring input

Thanks ygbo for the report.
Fixed #22435 -- Prevented adding a ManyToManyField from prompting for a default.

Thanks andrewsg for the report.
Moved misplaced transaction.atomic from 0dce44e16b

Thanks Florian Apolloner for noticing the issue and Aymeric
Augustin for the expertise.
Refs #22540.
Fix docs error with deconstruct() docs
Fixed #22429 -- Incorrect SQL when using ~Q and F
Fixed #22575 -- Fixed typo in docs/topics/class-based-views/generic-editing.txt.

Thanks adminq80 at gmail.com.
Fixed #22489 -- missing implemenation for search lookup

When custom lookups were added, converting the search lookup to use
the new Lookup infrastructure wasn't done.

Some changes were needed to the added test, main change done by
committer was ensuring the test works on MySQL versions prior to 5.6.