If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
+++
-*** `define-minor-mode' accepts a new keyword :variable.
+*** `define-minor-mode' accepts new keywords :variable, :after-hook.
+++
** `delete-file' and `delete-directory' now accept optional arg TRASH.