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