ipfw delete 100-300

[Ian Smith]

On Mon, 3 Aug 2015 17:38:18 +0800, Julian Elischer wrote:
 > my reading of the code I can see that 'ipfw delete 100-300' doesn't
 > work (well I know it doesn't work, but I had thought it was a bug),
 > Now I see that its just 'not supported'
 > 
 > It may be my imagination but (distant) past?

I was surprised too; ISTR having used that before too, but I may
misremember remembering ..

On 9.3 with rules 100-1000 in 100's, 'ipfw delete 600-800' deletes only 
600 .. without complaint, returning 0 if 600 existed.  NG for scripts.

cheers, Ian