[ns] License?

[Stephen Turner <S.R.E.Turner@statslab.cam.ac.uk>]

I hope I'm not just going blind, but I can't find any indication of a
License for NS. Does that mean I'm not allowed to modify or distribute it,
for example?

Thanks,

-- 
Stephen Turner               http://www.statslab.cam.ac.uk/~sret1/
  Statistical Laboratory, Wilberforce Road, Cambridge, CB3 0WB, England
  "The new operating system will recover more easily from system crashes."
                          (Microsoft, aiming high with Windows Millennium)