tests/test-parents

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
# test parents command

hg init a
cd a
echo % no working directory
hg parents

echo a > a
echo b > b
hg ci -Amab -d '0 0'
echo a >> a
hg ci -Ama -d '1 0'
echo b >> b
hg ci -Amb -d '2 0'

echo % hg parents
hg parents

echo % hg parents a
hg parents a

echo % hg parents -r 2
hg parents -r 2

echo % hg parents -r 2 a
hg parents -r 2 a