tests/test-issue433

Add option "hidden" to hgwebdir.

TODO: should this option be renamed to 'hide_from_index' or
maybe to 'index_ignore' (like Apache's mod_autoindex) ?

#!/bin/sh
# http://www.selenic.com/mercurial/bts/issue433

hg init a
cd a
echo a > a
hg commit -Ama

hg parents -r 0 doesnotexist
true