[Merge] ~mwhudson/livecd-rootfs/+git/livecd-rootfs:move-live-server-to-layers-3 into livecd-rootfs:ubuntu/master

[Didier Roche]

Review: Approve

This looks good! It’s great to see those hooks being removed.

I trust you on the "getfattr -n trusted.overlay.opaque" as I can’t test it in my local setup, but it’s greatly commented.
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https://code.launchpad.net/~mwhudson/livecd-rootfs/+git/livecd-rootfs/+merge/405239
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