are there any exact definition for ACCEPTABLE_LICENSES keywords, like:
		no-profit
		no-commercial-use
	pkgsrc/mk/mk.conf.example only lists the keywords, not the meaning.

	the question arose between us when we are looking into
	pkgsrc/mail/sendmail*.  sendmail* comes with "no-profit" keyword,
	however,
	- the term looks less restrictive than the GPL (we have two options,
	  one is no-profit, the other is like GPL)
	- GPL items are not marked
	so we think we may need more exact definition for these keywords,
	and when to define these keywords.

itojun