Suggestion regarding a new option for IPFW2

[Sten Daniel Sørsdal]

I have a humble suggestion to an IPFW2 option.

The option to send icmp error messages/tcp resets with src being
the original destination of the offending packet. 

I realize after looking at the src's that this might require a 
separate icmp_error() - please correct me if i'm wrong!

The intent is to "disguise" the source of the error message for
forwarding firewalls protecting servers.
Im thinking of a function like the one that is found in ipfilter.

Is this an option the community would appreciate?
Any thoughts and suggestions appreciated.

-- Sten