[mythtv/f33] (8 commits) ...Fixing el7 build, we can't enable libvpx on el7

Summary of changes: 2b50112... Mass rebuild for x264-0.161 (*) 86646cb... Fix for rfbz #5843 (*) 88502eb... Update requirements on mariadb, remove requirement for mari (*) 7542ebc... Fix accidental commit commenting out BR on mariadb devel pa (*) 3776f40... Restore helper scritp update_fixes.sh (*) b8235dd... Update to 31.0.130.20210108git016630a35c from branch fixes/ (*) e58d4c6... Update mythtv-ChangeLog update_fixes.sh and changelog (*) 9648660... Fixing el7 build, we can't enable libvpx on el7 (*) (*) This commit already existed in another branch; no separate mail sent