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Updated copyright for 2026
Added notes about faster crc32() options
Cygwin: testautomation run-time fix
stdinc: SDL_SetMemoryFunctions now handles NULL function pointers better.
Implement __chkstk for arm64
Rename SDL_mslibc_x64.asm -> SDL_mslibc_x64.masm
stdlib: Patched SDL_rand_f to compile on pre-C99 compilers.
Added SDL_aligned_alloc_zero()
stdlib: Add SDL_wcstoul(), SDL_wcstoll(), and SDL_wcstoull()