src: Fix SPDX license expression in copyright headers
Throughout the project, somehow, we’d copy-and-pasted an invalid SPDX
license expression everywhere. The +
suffix isn’t understood in SPDX,
it needs to be or-later
instead.
Fixed using git search-replace -f "SPDX-License-Identifier: GPL-2.0\+///SPDX-License-Identifier: GPL-2.0-or-later"
.
Signed-off-by: Philip Withnall pwithnall@endlessos.org