16891 fix unused label and drop -Wno-unused-label
Reviewed by: Andy Fiddaman <illumos@fiddaman.net>
Reviewed by: Dan McDonald <danmcd@edgecast.io>
Approved by: Gordon Ross <gordon.w.ross@gmail.com>

13588 want a tools geniconvtbl
Reviewed by: Toomas Soome <tsoome@me.com>
Approved by: Gordon Ross <gordon.w.ross@gmail.com>