Imported using git-ubuntu import.
Changelog parent: bc3a52a929a949c6788e6bfd46851076238a21ce
New changelog entries:
* Zero fill space in UEFI partitions, too
* Set LB_ISO_PREPARER to livecd-rootfs to avoid unbound variable in default string
Imported using git-ubuntu import.
Changelog parent: 8d6e24efc75872c5321ca41c8176be76736a452f
New changelog entries:
* snaps: Fixes for snap pre-seeding (LP: #1775710)
* Backport: Refactor functions out of ubuntu-cpc and ubuntu-server hooks.
* Add dependency on distro-info for snap preseeding