Add alternative signee to GPL licenses

[szepeviktor]

From #2623 (comment)

Reference: https://www.gnu.org/licenses/old-licenses/gpl-1.0.html

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Is this a good start?

[xsuchy]

This is good start. It fact, it seems to be correct. But for some reason the test fails. I tracked it to the first alt, but I could not find what is the problem there. It seems correct to me, but the test thinks otherwise. :(

[swinslow]

Thank you @szepeviktor and @xsuchy! I'll take a look and see if I can figure anything out from the failing tests.