pngquant was relicense under GPLv3  but after a short time author
added an exception and make pngquant as dual-licensed the latest
pngquant is dual-licensed:
GPL v3 or later, and additional copyright notice must be kept for older parts of the
code. See COPYRIGHT for details.
For commercial/closed-source/AppStore distribution please ask kornel(a)pngquant.org for
This is acceptable for include in Fedora ?
Sérgio M. B.