jail: fix jimport script ( the wrong structure was unpacked )
jail: jclone: re-initializate hwaddr for cloned vnet jail
jail: better basename management ( suggested by: ntinti, Issue #327 )
xen: add disk management (sync code with bhyve )
xen: nested virtualization property added
cloud-init: switched to using own cloud images ( provided by CBSD/ClonOS Project )