Comment 2 for bug 2051874

Some ideas for enhancement:

- Maintain a file of aliases so that contributor names as extracted from the commits can have corrections of various sorts applied (e.g., name changes, typo corrections, etc.)
- Integrate it into what create_release_notes.sh does (or vice versa) to create a one-stop command for initializing the notes for a release
- If we want to consider crediting documentation contributors separately, do some parsing of which files are changed by each path
- Add an option to identify the starting point for the stream of commits to look at by commit date (so that `git log --since` can be used); that might be better for major releases that fiddling to find the right commit reference to give to --prev-release-branch.