SPDX License format for new files

[Boudewijn Rempt]

Hi,

Samuel Gaist has worked to convert all of our codebase to the SPDX license format. Please use this format for new files from now on. See https://conf.kde.org/system/event_attachments/attachments/000/000/122/original/2020-akademy-spdx.pdf?1598772027 and https://community.kde.org/Guidelines_and_HOWTOs/Licensing for more information.

Cheers,

Boud

-- 
https://www.krita.org