The original package file was repacked to remove non-free
sources. The following folder and files were removed:

- glut-3.5 - This folder contains the non-free glut libraries[1]
- libSNL - This folder contains the sources of libsnl[2]. The library 
  was packaged separately[3].
- cgx-2.9/doc/* - This folder contains the sources of the documentation 
  for Calculix GraphiX. It was removed as the origin of the image files
  is not clear. Will be added again as soon as the copyright issues are
  clarified. 

[1] https://www.opengl.org/resources/libraries/glut/
[2] http://libsnl.sourceforge.net/
[3] https://packages.qa.debian.org/libs/libsnl.html