Bug#649530: [copyright-format] clearer definitions and more consistent License: stanza specification

[Jonathan Nieder <jrnieder@gmail.com>]

Charles Plessy wrote:

> If experimentations are blocked because the current specification does not
> allow unspecified types of paragraphs, how about considering to relax it ?

I honestly think that License-Exception stanzas already are a
fundamental enough change that they would have to be permitted in the
standard before actual copyright files. And that's not weird at all
--- it's normal for new features to involve changes to a spec.

Maybe I am missing something basic? Am I wrong to think that factoring
out license exceptions would be useful as a way of making copyright
files more readable, or do they have some glaring downside that I've
failed to notice?

Jonathan