change licencing to LGPL-2.1-or-later #8
Merged
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It appears that it is not permitted to put GPL-2.0-only code into LGPL-3.0-or-later code.
https://www.gnu.org/licenses/gpl-faq.en.html#AllCompatibility
Unfortunately, one of UAPI headers of Linux kernel (include/sound/firewire.h) is included in libhitaki for backporting, and it is licensed under GPL-2.0-only. The last change of the header is for v6.3 kernel, therefore it seems to be preferable to keep it for a while.
It is granted to put GPL-2.0-only code into LGPL-2.1-or-later code. This commit relicenses libhitaki itself under LGPL-2.1-or-later.