Code review comment for ~paelzer/ubuntu/+source/qemu:merge-7.0-kinetic

Thanks Andreas,
I do not know what continues CVE-2021-3507 to be special. But I'm ok just following security on that one.

Also some interim tests results - majority good, but some hiccups to resolve (as usual).

- x86
  - misc run hit a LXD issue loosing websockets-> rerun

- ppc
  - 24 migration issues
    - type mismatch (I had the wrong test git branch, ok on a rerun)
    - all reverse migrations failed
       error: unable to connect to server at 'testkvm-kinetic-from:49152': No route to host
      Retry if this persists, if yes I'll need to debug
  - 1 misc issue - flaky concurrent restart, not a problem
  - cross run hit LXD issue -> rerun

- s390x
  - got stuck at initializing guests
  - lxd issue getting bionic guests fully started -> retry
  - lxc exec $g runlevel is hanging

That is ok for a first run, I've cleaned all up and started the next.
On the current retries multiple arches go into apt issues .. *sigh* ... this seems to be some more work, but all except the potential ppc reverse migration issue seem to be cause by other components.