Comment 3 for bug 160521

The code has landed to enable per-file hooks. We have a 'news_merge' plugin which is present in the 2.1.0rc1 release to use as an example of how to build a changelog merger.

There is a thread on UDD that mentions "Bryce's merge_changelog" script. It looks like we probably need to track that down and get it turned into a configurable merge hook.