update_beacon_files: use different URL recommended by Michael Büchner (DDB)
update_beacon_files: use different URL recommended by Michael Büchner (DDB)

ubtue/ub_tools,ubtue/ub_tools,ubtue/ub_tools,ubtue/ub_tools,ubtue/ub_tools,ubtue/ub_tools,ubtue/ub_tools,ubtue/ub_tools