Bug#1117167: lintian: detect PNG Apple color profile non-free copyright claims

[Nilesh Patra <nilesh@fsfe.org>]

> Hi!  Charles Plessy made me aware that PNG files may embed copyright
> claims on the color profile:
>
> https://salsa.debian.org/newgateway-team/reviews/-/issues/25
>
> I didn't analyze if the copyright claim refer to any valid copyrightable
> portion of the file, but assuming they do (and this appears
> likely/reasonable), I think lintian should detect this and issue a
> warning about this situation, just like some other license-related
> warnings in lintian.
>
> What do you think?

Would you be able to confirm if the copyright claim refers to valid copyrightable
portion of this file? Would it also be possible to estimate how many packages
will show up with the warning once it is added?

If this is not an actual copyright problem on a large number of accounts, I think
it will annoy a lot of package maintainers once the check is added.

-- 
Best,
Nilesh