Handle dir listing of site root.

bin/werc.rc

@@ -69,6 +69,8 @@ fn txt_handler {
 
 fn dir_listing_handler {
     d=`{basename -d $1}
+    if(~ $#d 0)
+        d='/'
     echo $d|sed 's,.*//,,g; s,/$,,; s,/, / ,g; s,.*,<h1 class="dir-list-head">&</h1> <ul class="dir-list">,'
     # Symlinks suck: '/.' forces ls to list the linked dir if $d is a symlink.
     ls -F $dir_listing_ls_opts $sitedir$d/. | sed $dirfilter$dirclean' s,.*/([^/]+/?)$,<li><a href="\1">\1</a></li>,'