Acknowledgements: libvmdk

Copyright (C) 2009-2021, Joachim Metz <joachim.metz@gmail.com>

Additional credits go to:
* Tal Saiag, for providing multiple patches including improvements
  to the Python bindings.
* Joel Uckelman, for providing patches to make parsing of the descriptor
  file case-insensitive and handling renamed single monolithic sparse images.
