Fix income/pull with bundle and -R (issue 820).
Uses ui.setconfig() to tell bundlerepo where the main repo is. This is
needed for when the --repository option is used.
Adds tests to test-bundle and a new test script
test-mq-pull-from-bundle, which plays out the situation that initially
made me detect this bug
(hg -R .hg/patches pull ../bundle.hg).
#!/bin/sh
hg init a
cd a
echo bar > foo
hg add foo
hg ci -m 'add foo' -d '1000000 0'
echo foobar > foo
hg ci -m 'change foo' -d '1000001 0'
echo 'quiet:'
hg --quiet diff -r 0 -r 1
echo
echo 'normal:'
hg diff -r 0 -r 1
echo
echo 'verbose:'
hg --verbose diff -r 0 -r 1
echo
echo 'debug:'
hg --debug diff -r 0 -r 1
echo