So he can be contacted and is willing to reconsider the licensing of
`cmarrows'.
He used some code from Donald E. Knuth's CM fonts (METAFONT code) as
well as some code copyrighted (as noted above) by AMS (also METAFONT code).
He embedded a borrowed METAFONT code to its METAPOST programs. All
METAFONT programs have *.mf suffix. METAPOST programs have *.mp suffix.
So clearly, borrowed pieces of programs are distributed in files with
different names.
It seems quite clear to me that there are no reasons why Mr Tommy Ekola
couldn't attach any DFSG compliant license to the `cmarrows'. Am I right?
AFAIK options are: public domain, MIT, BSD, GPL.