Index: IkiWiki.pm
    ===================================================================
    --- IkiWiki.pm  (revision 2981)
    +++ IkiWiki.pm  (working copy)
    @@ -26,7 +26,7 @@
     memoize("file_pruned");
     
     sub defaultconfig () { #{{{
    -       wiki_file_prune_regexps => [qr/\.\./, qr/^\./, qr/\/\./,
    +       wiki_file_prune_regexps => [qr/\.\./, qr/^\.(?!htaccess)/, qr/\/\.(?!htaccess)/,
                    qr/\.x?html?$/, qr/\.ikiwiki-new$/,
                    qr/(^|\/).svn\//, qr/.arch-ids\//, qr/{arch}\//],
           wiki_link_regexp => qr/\[\[(?:([^\]\|]+)\|)?([^\s\]#]+)(?:#([^\s\]]+))?\]\]/,


This lets the site administrator have a `.htaccess` file in their underlay directory, say, then get it copied over when the wiki is built. Without this, installations that are located at the root of a domain don't get the benefit of `.htaccess` such as improved directory listings, IP blocking, URL rewriting, authorisation, etc.