ref: 3abb0cfc0cbae7d67ec1ebb3689d3e80b6e02bdc dir: /sys/lib/plumb/fileaddr/
addrelem='((#?[0-9]+)|(/[A-Za-z0-9_\^]+/?)|[.$])' addr=:($addrelem([,;+\-]$addrelem)*):?