bgermann

It would also be useful if pyHanko was optional instead of removing the whole feature.

That suggests to replace the Python stdlib's [xdrlib](https://docs.python.org/3/library/xdrlib.html) with mda-xdrlib. As far as I can see, the Cython module mdtraj.formats.xtc.xdrlib has a completely different API. Actually, I think the DeprecationWarning...

The #1818 replacement was done but it does not affect the C code. Please consider having the C code updated. I can hand in a pull request if you would...

I have sorted out the patch noise. Maybe you want to take another look.

Having the data files licensed under a Debian Free Software Guidelines compatible license is indeed necessary for inclusion in Debian. It is required for all files including non-executed ones.

If the files are not included with the package, they are of no concern to Debian. But then they cannot be used as part of the test suite as of...

The source comes from the source package, which holds source code that was downloaded by the packager at packaging time, not at build time. This allows to have all packages...