[SCM] ardour3/master: Update copyright file.

[Fabian Greffrath]

Am Donnerstag, den 19.09.2013, 13:00 +0200 schrieb Jonas Smedegaard: 
> The suggestion was to _quote_ Davis' mail.
> You _referenced_ an online representation of Davis' mail.  Not same!

Jaromir, please find an example in the wolf4sdl package.

> Also, include Davis' mail only if you consider it evidence of DFSG 
> compliance.  E.g. are you comfortable with the information coming via a 
> third party, that hints explicitly that it is only an interpretation of 
> a far more vague (claimed) statement from the actual author?

Well, I think that's a bit over-cautious. At a certain point we will
just have to trust upstream authors and take their words as given. Else
we could as well start to second-guess Copyright statements in source
file headers and challenge if the authors stated there are *really* the
copyright holders to that code or if they just claim so.

- Fabian