After some investigation, it seems that it is not possible to fix this in a proper way.
The only solution I see is to do something illegal and just re-assign the copyright, in hope that no original author will ever do anything about that. But the original authors all seem to be impossible to contact. -- Salvo Tomaselli "Io non mi sento obbligato a credere che lo stesso Dio che ci ha dotato di senso, ragione ed intelletto intendesse che noi ne facessimo a meno." -- Galileo Galilei http://ltworf.github.io/ltworf/