Providing a license is mutually exclusive with placing into the public domain.
You are entitled to your opinion as to what DJB should have done, but the decision is his to
make. He's not "in error" - he's just done something other than what you would have done.
> ... though this requires interpreting what he means by "etc."
"etc" is not defined (no longer defined) by DJB, it's defined by the legal definition of