[Merge] ~mwhudson/livecd-rootfs/+git/livecd-rootfs:ubuntustudio-no-dvd into livecd-rootfs:ubuntu/master

[Steve Langasek]

Merged but not uploading at the moment as there's another livecd-rootfs in -proposed and a test backlog.
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https://code.launchpad.net/~mwhudson/livecd-rootfs/+git/livecd-rootfs/+merge/465832
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