Use wsgi.url_scheme instead of ad-hoc CGI checks.
Instead of each place in hgweb_mod that needs to check for SSL or get
the protocol scheme (http vs. https) doing it ad-hoc, make them just
look at the wsgi.url_scheme which because of previous patches is now
always set correctly.
#!/bin/sh
# a test for issue586
hg init a
cd a
echo a > a
hg ci -Ama
hg init ../b
cd ../b
echo b > b
hg ci -Amb
hg pull -f ../a
hg merge
hg rm -f a
hg ci -Amc
hg st -A