This update for lxd fixes the following issues:

- Change license to AGPL-3.0-only AND Apache-2.0:
  + All Canonical contributions have been relicensed and are now
    under AGPLv3. Community contributions remain under Apache 2.0.

- update to 5.21.1:
  + Restricted metrics client certificate security regression fix
  + New image server remote for non-Ubuntu images
  + List all storage volumes API and CLI support
  Highlights 5.21.0:
  + Change of version numbering scheme
  + Fine grained authorization for OIDC users
  + Optimized block volume refresh for Ceph RBD
  + Device config override when importing instance backups
  Highlights 5.20.0:
  + LXD change to AGPLv3
  + Create metadata and data OSD pools as part of creating a cephfs
    storage pool
  + Debug mode for EDK2 UEFI firmware
  + Authorization restructure
  + Shiftfs support has been removed
  
- add attr as dependency for setfattr (boo#1190416)

- update to 5.19:
  Highlights:
  + Add support for per-NIC device limits.priority option
  + Instance volume configuration through disk device

- update to 5.18:
  Highlights 5.18:
  + Receive OVN logs into LXD and Loki
  Highlights 5.17:
  + ZFS 2.2 delegation support
  + Add remote copy support for custom volume snapshots
  + Allow recovery of empty storage pools