+in many places to look in srcdir for pages. Also, there are possible
+security attacks in the vein of providing a file ikiwiki would normally
+skip in the srcdir, and tricking it to processing this file instead of the
+one from the underlaydir.
+
+There are also difficulties related to removing files from the srcdir, and
+exposing ones from the underlaydir. Will need to make sure that the mtime
+for the source file is zeroed when the page is removed, and that it then
+finds the underlay file and treats it as newer.