* Include favicon.ico only if you enable the [[plugins/favicon]] plugin.
* Include wikiicons/diff.png (and the wikiicons directory) only if you enable the CGI.
* Include a hypothetical restructuredtexthelp.rst or similar for other formats only with those formats enabled.
+
+I can see two good ways to implement this. Ideally, with [[conditional_text_based_on_ikiwiki_features]] available, ikiwiki could parse a page like conditionalpages.mdwn, which could contain a set of conditional-wrapped page names; that seems like the most elegant and ikiwiki-like approach. Alternatively, [[/ikiwiki.setup]] could contain a Perl-generated exclude option by default; that would work, but it seems hackish.
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