Remove limits on filenames?

[fragglet]

As I recall (apologies if you already fixed this), there are limits on the length of filenames for overrides. For example, you can do this:

[musics]
D_E1M1 = D_C1M1

But you can't do this:

[musics]
D_E1M1 = one/two/three/four/five/six/some/long/path_name/D_C1M1

This is annoying since it places restrictions on how a deutex tree can be structured - hence why Freedoom had to have an elaborate symlink-based setup.

I think there are also restrictions on file extensions? You can only specify the "stem" of the filename and have to let Freedoom work out the extension? And maybe that "stem" can only be 8 characters long, too?