[NETLINK]: Schedule removal of old macros exported to userspace

[David Miller]

From: Stefan Rompf <stefan@loplof.de>
Date: Sat, 9 Dec 2006 15:58:01 +0100 (MET)

> But when even glibc needs internal compat headers to compile with the second 
> kernel version that provides userspace headers, what is the long-term - even 
> mid-term - perspective of make headers_install then?

Relax Stefan, I'll make sure these macros never go away.

They may emit warnings, via __attribute__((deprecated)), at
some point, but they will never be flat out removed.