Added 1.6.3 release note for refs #22256.
Don't copy list for iteration.
Refactor. Stop using memory for list copies.
Merge pull request #2508 from tomwys/patch-1

Don't copy list for iteration.
Merge pull request #2509 from tomwys/patch-2

Refactor. Stop using memory for list copies.
Revert "Merge pull request #2508 from tomwys/patch-1"

This reverts commit c45607e9395ffd05c2cff454fdb55b3ab05dc0e3, reversing
changes made to 9769337ca855f4831c855d6663ff3f688ee1652d.
Added an explanatory comment. Refs #22017
Fixed #22347 -- Unified FileSystemStorage documentation.

Thanks nliberg for the report.
Fixed #22218 -- Deprecated django.conf.urls.patterns.
Normalized urlpatterns to lists; updated documentation.
Silenced deprecation warnings; deprecated prefix argument to i18n_patterns().
Proof edits.
Amended deprecation message per Carl's suggestion.