[Merge] ~davidkrauser/livecd-rootfs/+git/livecd-rootfs:fix-buildd-dns into livecd-rootfs:ubuntu/master

[David Krauser]

David Krauser has proposed merging ~davidkrauser/livecd-rootfs/+git/livecd-rootfs:fix-buildd-dns into livecd-rootfs:ubuntu/master.

Requested reviews:
  Core devs (core)
  Canonical Cloudware (cloudware)

For more details, see:
https://code.launchpad.net/~davidkrauser/livecd-rootfs/+git/livecd-rootfs/+merge/376597

Fixes: https://bugs.launchpad.net/ubuntu/+source/livecd-rootfs/+bug/1855930
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