- Update to LXD 4.0.0. The full upstream changelog is available from:
https://discuss.linuxcontainers.org/t/lxd-4-0-lts-has-been-released/7231
boo#1168338

Breaking Changes:
* Removal of --container-only, replaced by --instance-only

+ VM: Support for backup (import/export)
+ PCI and USB devices in the resource API
+ Support for multiple ipvlan NIC devices
+ Support for host addresses on routed NIC
+ Support for editing cluster roles
+ Disk usage for custom volumes
+ Disk usage for snapshots
+ Support for passwordless PKI mode