Version 2.5: GPL-2 (only?), see COPYING in tarball. Version 2.8 and later: BSD (3-clause), see COPYING in tarball.
Ulrich, thanks for noticing. It is a bsd license but it seems to have more than BSD-2 and less than BSD-4. I'm not sure? Recommendations? Should we add a BSD-3 to $PORTDIR/licenses?
It's the so-called "modified BSD license" or "3-clause BSD license", and have it already in licenses/BSD.
(In reply to comment #2) > It's the so-called "modified BSD license" or "3-clause BSD license", and > have it already in licenses/BSD. s/and have it/and we have it/