LH_BINARY_IMAGES was: Rescue flavor improvements

[r.alex.owen at gmail.com (Alex Owen)]

>  The obvious example is  LH_BINARY_IMAGES,which can contain permutations of
>  "iso", "usb-hdd" and "net".

So if I find a place in the code where LH_BINARY_IMAGES is expected to
be single valued (ie not a list of image types) then that is a bug?

Alex