Renamed "manifest" to "files" in web templates.
manifest.tmpl is still used, so people having their own templates don't have
to change them. "cmd=manifest" still works, new style URLs are not affected,
because they already used "/file/".
foo renamed from bar:26d3ca0dfd18e44d796b564e38dd173c9668d3a9
rev offset length base linkrev nodeid p1 p2
0 0 6 0 0 26d3ca0dfd18 000000000000 000000000000
1 6 7 1 1 d267bddd54f7 26d3ca0dfd18 000000000000