Harmonic and melodic minors seem to me to be uncommon, but also, I think ABC only recognizes the 7 normal 'Greek' modes. I have even used phoney keys in ABC to get the right number of sharps or flats on the key signature for a few tunes, so don't take the specified key litterally. The actual keynote in ABC will be the real one you enter in in spite of what the key signature mayn say.

[Those that are unfamiliar with harmonic and melodic minors might consult the tune coding section near the end of Herrmann and Huntington's 'Sam Henry's Songs of the People'. I think this is taken from Bertrand Bronson, but I don't have his publications on the subject]