Consider upgrading to live-boot 1:20180328+

In particular, https://bugs.debian.org/886328 (“use /run/live instead of /lib/live/mount”) might affect all kinds of stuff such as memory erasure, live-persist, and more. OTOH it might allow us to drop some of our delta e.g. config/chroot_local-patches/live-boot:_dont_mount_live_overlay_twice.patch.

Related issues

Blocks #15146
Blocks #16209
Blocked by #15944 (closed)

Original created by @intrigeri on 15477 (Redmine)

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information