[vlc/el8] (12 commits) ...Fixup sftp disabled for el8

Summary of changes: 4f47bb5... rebuild for libdvdread ABI bump (*) aba68d5... Rebuild for dav1d 0.5.1 (*) 23d716d... Revert "Rebuild for dav1d 0.5.1" (*) afb754f... Rebuild for new x265 (*) 3c95485... Mass rebuild for x264 (*) 23b19ea... Rebuild for new libplacebo version (*) 2c95fdb... Update libplacebo patch (*) 8a90824... Rebuild for new protobuf version (*) 2b644df... Update snapshot (*) 268a8d9... Enable mmal-avcodec for rpi (*) a490358... disable libssh2 on el8 (*) b83425f... Fixup sftp disabled for el8 (*) (*) This commit already existed in another branch; no separate mail sent