dnf has a bug where it will display the error message, "No matches found for the
following enable plugin patterns: config-manager". This message is a red
herring and dnf does, in fact, find and enable the display-manager plugin for
the command. The message may be safely ignored.
Clean up the rocky-tools root dir, the mirror script has it's own subdir too.
This makes rocky-tools scale better. As this breaks existing links, we should
do it as early as possible, before GA.