zstd: Sync with upstream 5.16 fixes and improvements
Bugzilla: http://bugzilla.redhat.com/2034834
Sync zstd code from v5.16 in to get fixes, performance improvements, and easier maintenance longer-term.
Signed-off-by: Neal Gompa ngompa@centosproject.org
Edited by Neal Gompa (ニール・ゴンパ)