The groff source tree is usually licensed to GPL. That is excellent. But there are also some documents under the GNU FDL. This is regarded as bad by Debian. Many years ago, Debian made the groff package as non-free because of the FDL. So I changed many documentation files in the groff tree to GPL.
In 2006, Debian made a voting wether the FDL should become free software: http://www.debian.org/vote/2006/vote_001.en.html They decided that the FDL without invariant sections would be compatible with Debian. But the Debian discussion about the FDL is right. There are still many weaknesses in the FDL. So which license should we prefer for documentation files: - make all documentation files into GPL - make all documentation files into FDL - keep the licenses of all files as they are In any case, the file LICENSES has to be updated accordingly. Bernd Warken