rtnetlink: add babel protocol recognition

Babel uses rt_proto 42. Add to userspace visible header file.

Signed-off-by: Dave Taht <dave.taht@bufferbloat.net>
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
1 file changed