part-by-label: an additional benefit

Remember the commit that autocreates human-readable disk device names under /dev?  (Here’s a reminder.)  It’s now in 5.4 – technically, since 5.4.2.  Anyway, it will automatically identify the root USB disk when you boot from a USB .img file, so you no longer have to guess which /dev/daX file it was – usually da8 but sometimes you got a surprise instead.