From: Stephen Hemminger <redacted>
Date: Fri, 21 Mar 2008 11:05:15 -0700

Make socket filters work for netlink unicast and notifications.
This is useful for applications like Zebra that get overrun with
messages that are then ignored.

Note: netlink messages are in host byte order, but packet filter
state machine operations are done as network byte order.

Signed-off-by: Stephen Hemminger <redacted>

Applied, thanks.

Although we will have to, at some point, address the
issue of how to transfer netlink on-the-wire portably
and how that interacts with the existing userland
interfaces.