use/docs/license will copy the texts contained in branding
package ("notes" one) over to the image's rootdir so these
can be read with ease; otherwise one has to look up the
right package at best (or unpack squashfs, no user can be
really expected to do that just to *read* a *license*).

This was originally profiles/scripts.d/01-copy-license
script from m-p-d; got cut down heavily.