When we update VOMS and VOMRS (using pacman), a bad thing happens. After the
old VOMS or VOMRS is uninstalled, and we have untarred the new one, we call the
configuration script. However, it configures only the VDT VO, regardless of the
VOs that actually existed before the update. We should modify the configuration
scripts to look for existing VOs (with data preserved in vdt-app-data) and, if
found, reconfigure them.
In each case, the magic function to modify is called build_vo_list().