FYI there is also a thread "nmap is non-free software" in:
https://lists.defectivebydesign.org/archive/html/directory-discuss/2021-01/threads.html
Apparently [1] the nmap author is listening to complaints and will
change license terms:
[...] I understand how the current license wording could
give that interpretation, but it's not what we meant. Instead of
mentioning the "software" of "proprietary software companies", it should
probably mention the "proprietary software" of "software companies".
Because as you noted, a "proprietary software company" might still make
some free software too. And maybe a "free software company" could still
have some non-free products. I'll try to fix this before the next Nmap
release.
[1]
https://lists.defectivebydesign.org/archive/html/directory-discuss/2021-01/msg00012.html
