Thanks Simon Charette for help with the patch.

Thanks Trac alias karyon for the report and Tim for the review.

This is a security fix.

Thanks Kevin Graham Foster for the report and Tim Graham for the review.

Thanks Tim Graham for the review.

Fixed #26765 -- Made CommonMiddleware no longer set an ETag when response has Cache-Control: no-store.

Workaround a bug with MariaDB and MySQL native client not stripping the
`5.5.5-` prefix.

Forward port of cb780114 from stable/1.10.x.

Fixed a regression in 625b8e92:
improper short-circuiting could lead to a KeyError when threads
concurrently call RegexURLResolver._populate().

Thanks Tim Graham for the review.

Reverted "Fixed #25388 -- Added an option to allow disabling of migrations during test database creation"

This reverts commit 157d7f1f since it
disables migrations all the time, not just during tests.

Follow up to 67d98441.