Accounted for the three stages of population: app configs, models,
ready() methods of app configs.

The rate at which we've increased this has not been keeping up with hardware (and software) improvements, and we're now considerably behind where we should be. The delta between our performance and an optimized implementation's performance prevents us from improving that further, but hopefully once Python 2.7.8 and 3.4+ get into more hands we can more aggressively increase this number.

It's been marked as "not recommended" since 1.6. Anyone still using it
may refer to older versions of the docs.

Thanks to @timgraham for the review.

Also changed test to use assertNotIn.

Thanks Loic Bistuer and Tim Graham for help and review.

This reverts commit d9c01da1.

This is poor advice as it breaks the test client login (refs #22934).
We can add a note like this back after refs #22986 is resolved.

Thanks sebastien at clarisys.fr for the report and gautier
for the patch.

Thanks claudep for review.

And follow more closely the class of characters defined in the
RFC 3986.
Thanks Erik van Zijst for the report and the initial patch, and
Tim Graham for the review.

Thanks Anssi and Tim for reviews.

Fixed #21832 -- Updated prompt, tests, and docs to show that USERNAME_FIELD supports FK after 9bc2d766.

Also added get_input_data() hook in createsuperuser.

Thanks Chris Jerdonek and Tim Graham for review.

Thanks brylie.

Thanks Diego Cerdán for the suggestion.

Thanks haimunt at yahoo.com for the suggestion.

Refs #9722. Thanks Tim Graham for the review.

Thanks Michael Manfre for the report and Tim Graham for the review.

Thanks Collin Anderson for the report and original patch.

"Eric Palakovich Carr" should be sorted by "P", not "C".