ref: 0a7279b3aff262493e5c80f17a540a4b5e8987a5 dir: /sys/lib/plumb/fileaddr/
addrelem='((#?[0-9]+)|(/[A-Za-z0-9_\^]+/?)|[.$])' addr=:($addrelem([,;+\-]$addrelem)*):?