RFH: dukpy - Copyright statement for vendored and modified code

[Sao I Kuan <saoikuan@gmail.com>]

Dear mentors,

I am packaging DukPy[1] right now, and am having a question about a
copyright statement.

[1] https://salsa.debian.org/med-team/dukpy

It seems DukPy has a lot of vendored JavaScript modules, but modified
by DukPy author.
But the DukPy author didn't mention the vendored modules' copyright statement.

Should I find the original code and follow those copyrights?
Like, there is Punycode[2] in DukPy with some modifications[3]. Should
I add [Punycode original copyright] into d/copyright? Or just place
[DukPy copyright] is enough?

[2] https://github.com/bestiejs/punycode.js
[3] https://salsa.debian.org/med-team/dukpy/-/blob/master/dukpy/jscore/punycode.js
[Punycode original copyright]
https://github.com/bestiejs/punycode.js/blob/master/LICENSE-MIT.txt
[DukPy copyright] https://salsa.debian.org/med-team/dukpy/-/blob/master/LICENSE

These files are in the same situation (please see the [1]). Please let
me know how to fix this situation.
 - dukpy/jumodules/semver.js
 - dukpy/jscore/punycode.js
 - dukpy/jscore/url.js
 - dukpy/jscore/querystring.js

Thank you!


Sincerely,

Sao I Kuan
saoikuan@gmail.com