Merge #8557: [contrib] Rework verifybinaries
faaed88 [contrib] verifybinaries: Mention mandatory preparation step (MarcoFalke)
fa917f6 [contrib] verifybinaries: Keep downloads by default (MarcoFalke)
fab1f92 [contrib] verifybinaries: Adjust parsing to new rc path (MarcoFalke)