Killing IPTOS_CE and IPTOS_ECT

[Bruce M. Simpson]

Rui Paulo wrote:
> Well, I was asking for comments regarding on the usage of these flags. 
> I was hoping to commit ip.h along with TCP ECN.
>
> This doesn't really need to be before the branch, I think.

Looks fine to me. ECN would be a useful feature to have. AFAIK nothing 
else uses these flags.

Although I do remember it being possible to fingerprint Solaris boxes 
based on their response to the ECN Echo, this was around 6 years ago.

I second Andre's request for a full unified diff if you want it to go in 
ASAP.

regards,
BMS