[IDEA] Put a list of available snapshots in /boot

[adepssimius]

I seem to recall that it is possible to boot to a previous snapshot by modifying the rootflags parameter of cmdline.txt in case your xbian copy no longer boots. That would be all dandy, except that there is no easily accessible list of snapshots when I put the SD card into my computer to change the parameter. It would be great if there was a "snapshots.txt" in the /boot partition which was updated when snapshots were created or destroyed. If your install failed to boot, you could insert the SD card into your computer, find the snapshot you want from the snapshots.txt file, update cmdline.txt as needed, and be on your merry way all without ever leaving the comfort of your FAT boot partition.

Ideas/questions/comments?