[vlc/f31] (14 commits) ...Merge branch 'master' into f31

Summary of changes: 8137439... Clean-up old f30 patch (*) 9e8f30f... Clean-up srt (*) 7cb3507... Switch to devtoolset-8 (*) 4b8399b... Don't disable shortcommit0 (*) ffe738c... Fix dts_ver occurence (*) 3e89a0d... Rebuilt (*) 6012dba... Add BuildRequires qt5-qtbase-private-devel for f33 (*) fb55b06... Rebuilt (*) 8110bab... Add conditional (*) 50a2ce2... Rebuilt for new dav1d and libplacebo (*) 75ffdd7... Mass rebuild for x264 (*) 37ba87a... Rebuilt (*) a3f7b2e... Rebuilt (*) a18d81a... Merge branch 'master' into f31 (*) This commit already existed in another branch; no separate mail sent