Comment 3 for bug 347685

Label-by-default: bug 347817 (fixed). Sorry for forgetting about the relevant constraints. I think we should fix this anyway, though.

findfs isn't currently in the initramfs, and I lean strongly towards a simple backport versus writing our own, particularly as this isn't a case we care lots about. The code from Debian ends up being effectively rather simpler than it looks, since we always have sed in our initramfs.