Code review comment for lp:~thomir-deactivatedaccount/bzr/add-global-config

So I'm just trying to test this interactively, and it's not obviously hooking in to the things I might like to configure, such as locks.steal_dead, debug_flags, 'config --scope global' etc. Perhaps we should merge it and hook it up later? I would be reluctant to actually document this as a new feature until it's at least mostly working.