Implementations of RFC 4285

Hi all,

I was discussing this with Brian off-line and thought the list might know
more. Does anyone know of RFC 4285 implementations?

The reason I ask is that it seems we have a conflict in an error code
(144) interpretation between RFCs 5555 and 4285. Obviously 5555 shouldn't
have used error code 144 for that purpose but it slipped passed us all it
seems. So, it would be good to know if there are any 4285 implementations
out there to see if there is a problem already in practice between the two
RFCs.

Thanks,
Hesham