License of Hurd's common lisp bindings

[Maxime Devos]

Hi,

I was wondering if the Common Lisp bindings by "Flavio Cruz" would
make a nice start for GNU Guile bindings.  I have questions on the
license: according to

https://git.savannah.gnu.org/cgit/hurd/incubator.git/tree/hurd.asd?h=clisp

the bindings are "GPL v3.0".  Does this mean "GPL v3.0", and only that
version, or is this "GPL v3.0"-or any later version (at your choice etc.)?
Personally, I would prefer "GPL v3.0"-or-later.

Maxime.
p.s. I'm reading mach/message.lisp right now.  Nice interface!
Converting the clisp to scheme shouldn't be much trouble.

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