ref: 3e9ae26c2ea9c1b0c1bfcc0ad02c58bc65cb5294 dir: /sys/lib/plumb/fileaddr/
addrelem='((#?[0-9]+)|(/[A-Za-z0-9_\^]+/?)|[.$])' addr=:($addrelem([,;+\-]$addrelem)*):?