This update for lxd fixes the following issues:

Update to LXD 3.20 (boo#1162299).

The full upstream changelog is available from:
https://discuss.linuxcontainers.org/t/lxd-3-20-has-been-released/6673

+ Server side support of API collections
+ New unix-hotplug device type
+ Support for standby cluster members

- Update packaging to use GOPATH="_dist" rather than trying to move everything
to vendor/. This is the recommended approach by upstream (and makes our
specfile marginally less horrific).
- Fix bash-completion by installing it to the correct path. (boo#1162426)
- Fixed a segfault on Leap 15.1 (boo#1156336)