Bug#286842: compatibility suggestion

[Justin Pryzby <justinpryzby@users.sourceforge.net>]

I'm rethinking this bug report; although it would not be entirely
sufficient, much of my request would be satisfied if lintian were to
error on m/Copyright[^a-z]*GPL/si.

This would solve about half of the problems about which I'm
complaining (in other people's packages, not lintian).

There still needs to be a better enforcement of the copyright file;
each file needs to list at least one copyright holder, but I'm not
sure how to do that for existing packages, without introducing lots of
false-positive errors (for new packages, it should be sufficient for
dh_make to use "Copyright Holder: <names here>" instead of
"Copyright:").

Justin