Merge branch '3.1.x' into 3.2.x
* 3.1.x:
[ticket/14789] Remove obsolete check_form_key() and add missing hashes
[ticket/14789] Move form key checks to where they actually do something
Merge pull request #4474 from marc1706/ticket/14789
[ticket/14789] Move form key checks to where they actually do something
* marc1706/ticket/14789:
[ticket/14789] Remove obsolete check_form_key() and add missing hashes
[ticket/14789] Move form key checks to where they actually do something
Merge branch 'prep-release-3.1.10' into 3.1.x
* prep-release-3.1.10:
[ticket/14789] Remove obsolete check_form_key() and add missing hashes
[ticket/14789] Move form key checks to where they actually do something