-To fix, seems I would need to record the actual list of pages that are
-currently included on an inline page, and do a comparison to see if any
-have changed. At first I thought, why not just add them to the dependencies
-explicitly, but that fails because the dependencies pagespec fails to match
-when a negated expression like "!tag(bugs/done)" is matched.
-
-So, quick fixes aside, what's the generic mechanism here that a plugin can
-use to let ikiwiki know that a page should be updated if some other page
-stops matching its dependencies pagespec?