Refs #25019.

Thanks to pdewacht for the patch.

refs 316b8d49

Thanks João Silva for reporting the problem and Tim Graham for finding the
problematic RE and for review.

This is a security fix; disclosure to follow shortly.

This is a security fix; disclosure to follow shortly.

Thanks to Sjoerd Job Postmus for the report and draft patch.

The session record is now only created if/when the session is modified. This
prevents a potential DoS via creation of many empty session records.

This is a security fix; disclosure to follow shortly.

The conditional setting of `get_query_set` is required for correct behaviour
if running Django 1.8. The full gory details are here:

http://lukeplant.me.uk/blog/posts/handling-django%27s-get_query_set-rename-is-hard/

Commit 15f82c70 ("used pyinotify as change detection system when
available") introduced a regression where editing a file in vim with
default settings (writebackup=auto) no longer causes the dev server
to be restarted. On a write, vim moves the monitored file to a backup
path and then creates a new file in the original. The new file is not
monitored as it has a different inode. Fixed this by also watching for
inotify events IN_DELETE_SELF and IN_MOVE_SELF.

Thanks Jaap Roes for completing the patch.

Unused since 5d863f1f.