bug#19113: Generate a ChangeLog file from commit logs

[Glenn Morris]

Glenn Morris wrote:

> 3) How will I mark a change so that it does not generate a ChangeLog?

I'm going to unilaterally adopt "start the commit message with '# '"
for this.

> 5) Will I be able to mark a portion of a log to be excluded from the
> generated ChangeLog?

I'm going to unilaterally adopt "start those lines of the commit message
with '# '" for this.

Only 3 lines of the entire existing Emacs commit log start with '# ',
and all 3 of those lines could happily be omitted from a generated ChangeLog.

Maybe someone will add that functionality to the generate script, and
maybe they won't. I'm going to use that markup anyway.