Major changes in 2.21.91 are:
* String cleanups
* Inhibit autorun for things we mount ourselves
* Fix crashes and leaks
* Only show selinux context if selinux detected
* Default to move, not copy when dragging from trash
* Don't autorun/automount non-local mounts
* Fix case where we could run out of file descriptors
* Handle drop of files on the desktop
* Fix sensitiveness of delete from trash menu item
* Fix open with context menu in always-use-browser mode