bug#19113: Generate a ChangeLog file from commit logs

[Paul Eggert]

Stefan Monnier wrote:
> Sounds less risky than testing the new changelog-free release process on
> a release which i supposed to be short, tho.  Spurious conflicts are
> part of life, to some extent.

OK, I'll give that a try in my private copy and see how well it works out.

There's another thing that I would like to get working better too, namely, 
rotation of commit messages into ChangeLog.1 etc. files.  So that's two birds 
that perhaps I can kill with 1.5 stones.