ref: ae8a9f8b900f6bd4e0f9c6cd99fbe44c1a46e4a3 dir: /sys/lib/plumb/fileaddr/
addrelem='((#?[0-9]+)|(/[A-Za-z0-9_\^]+/?)|[.$])' addr=:($addrelem([,;+\-]$addrelem)*)