with the recent refactoring, external clusters were not handled
correctly with librd if a pveceph or storage specific ceph config
exists.
change the behaviour to include the pveceph config file only for pveceph
managed clusters, and a storage specific one only for external ones.
set mon_host correctly using the values from storage.cfg for external
librbd clusters.
Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
5fc02afb7d