n8.0.3
swscale/ppc: Move VSX-using code to its own file
swscale: add support for new 10/12 bit MSB formats
swscale/ppc: fix ASAN stack-buffer-overflow in yuv2planeX
swscale/ppc: fix LOAD_FILTER overread in VSX path
all: fix typos found by codespell
swscale: rename SwsContext to SwsInternal
swscale/internal: group user-facing options together