Comment 1 for bug 546899

John A Meinel indicated that the PQM setup employed by bzr probably doesn't use the plugin either.
So this bug here is affecting bzr in a number of ways:
1. news_merge plugin source code: make it use a versioned configuration file
2. bzr source tree metadata: add a suitable configuration so the bzr NEWS file is handled by the plugin
3. bzr pqm administration: ensure that PQM uses the plugin and its (now hopefully versioned) configuration