Merge branch 'jk/push-progress'

* jk/push-progress: push: pass --progress down to git-pack-objects t5523-push-upstream: test progress messages t5523-push-upstream: add function to ensure fresh upstream repo test_terminal: ensure redirections work reliably test_terminal: catch use without TTY prerequisite test-lib: allow test code to check the list of declared prerequisites tests: test terminal output to both stdout and stderr tests: factor out terminal handling from t7006