What is the license of this project?

[dreirund]

Ahoj,

there is an Arch Linux AUR package that packages this software.

Arch Linux packaging requires that a license is given.

However, I cannot find any licensing here.

So:

• What is the license of this project?
• Can you please add a proper LICENSE, LICENSE.txt, LICENSE.md, COPYING, COPYING.txt or COPYING.md file to the root directory of the project?

Regards!