only issue with it is that it is run even when ikiwiki has not
rendered any updated pages. Bah, I think you do need the new hook, how
annoying..
+
+> * Depends whether the plugin would be on by default. If yes, then yes.
+> If the admin has to enable it, I'd think they'd want the error.
+> * Changed the other errors to warnings.
+> * The name might be wrong: there isn't anything rsync-specific about the
+> plugin, that's just the command I personally need to run. --[[schmonz]]