If default sorting is name, offer name-descending with one click.
Additionally no longer ignore case when sorting by name to match default
sorting. This makes e.g. a repository "FOO" being listed before "bar".
#!/usr/bin/env python
#
# An example CGI script to use hgweb, edit as necessary
import cgitb, os, sys
cgitb.enable()
# sys.path.insert(0, "/path/to/python/lib") # if not a system-wide install
from mercurial import hgweb
h = hgweb.hgweb("/path/to/repo", "repository name")
h.run()