What does "Freeware" mean? With only that said, one cannot assume that file is free software/open source.
The intention is probably to have it licensed under the same terms of the rest of Ruby, so it would be nice to change that header to not mention any explicit licensing terms (even though "Freeware" is not a proper license) so that the global licensing terms of Ruby also apply to this file.
This issue was solved with changeset r42994.
Antonio, thank you for reporting this issue.
Your contribution to Ruby is greatly appreciated.
May Ruby be with you.