* For products that are directories (like manuals), allow a default

suffix other than index.html to be declared.  E.g. if a build does

    echo "doc manual $out manual.html" >> $out/nix-support/hydra-build-products

  the default link for the product is

    http://localhost:3000/build/417/download/1/manual.html

  but other files are also accessible, e.g.
    
    http://localhost:3000/build/417/download/1/style.css

src/root/product-list.tt

@@ -6,7 +6,9 @@
 
     [% FOREACH product IN build.buildproducts -%]
 
-      [% uri = c.uri_for('/build' build.id 'download' product.productnr product.name) %]
+      [% uri = "${c.uri_for('/build' build.id 'download' product.productnr)}"
+          _ (product.name ? "/" _ product.name : "")
+          _ (product.defaultpath ? "/" _ product.defaultpath : "") %]
       
       [% SWITCH product.type %]