[$] A license change for Nmap

It may be kind of an obvious statement, but licensing terms matter in our
communities. Even a misplaced word or three can be fatal for a license,
which is part of the motivation for the efforts to reduce license
proliferation in free-software projects. Over the last few months, various
distribution projects have been discussing changes made to the license for
the Nmap network scanner; those changes
seemed to be adding restrictions that would make the software non-free, though
that was not the intent. But the incident does serve to show the importance of
license clarity.