[mpv/el8] (12 commits) ...rebase on master

Summary of changes: 7a7fdda... Rebuild against sdk9 nv-codec-headers (*) 54c98cb... Implement CI/CD compatible versionning (*) b29d966... Obsoletes older ci/cd (*) 2589ad2... Update snapshot (*) 24acc7c... Add libplacebo - fix FFmpeg DRM PRIME (*) 649c4fd... Rebuild for new ffmpeg version (*) 4d89abd... Update snapshot (*) dd24fc8... Add changes for el8 (*) f10dcb9... Add pkgconfig(luajit) (*) 738e2ff... Rebuild for switch to lua (*) fc50a97... remove unused lua br (*) 071026b... rebase on master (*) This commit already existed in another branch; no separate mail sent