Unrar package might contain proprietary code.

[Clément Lassieur]

I had a look at the source of the recently commited "unrar" package, and
I could not find neither "copyright" lines nor pointers to the full
notice, except in unrarlib.h and unrarlib.c, which belong to a different
project.  IANAL, but according to GPLv2 and
https://www.gnu.org/licenses/gpl-howto.en.html, those things are
mandatory, COPYING is not enough.  So I think the "unrar" package
contains proprietary code.