* If a file in the srcdir is removed, exposing a file in the underlaydir,
ikiwiki will not notice the change and rebuild it until the file in the
underlaydir gets a mtime newer than the mtime the removed file had.
-* Pages rendered from files in the underlaydir should not have a history
- link, since there's no file in the svn repo to view the history of.
* Markdown will try to expand stuff inside postprocessordirectives. For
example, if there are two *'s, it will turn them to html em's, which
breaks things unexpectedly and requires escaping.