ref: 5ea63c61e0b4fba7d09edd5e471a7e7cd8e3da74 dir: /sys/lib/plumb/fileaddr/
addrelem='((#?[0-9]+)|(/[A-Za-z0-9_\^]+/?)|[.$])' addr=:($addrelem([,;+\-]$addrelem)*)