ifup warnings on systems with multiple NIC

Binary package hint: avahi-autoipd

The bug applies to all avahi-autoipd package versions.

The script /etc/network/if-up.d/avahi-autoipd checks whether the route
to the 169.254.0.0/16 network is already defined by means of this command :

[ "`ip route show dev $IFACE | grep ^169.254.0.0/16`" ] && exit 0

If you have multiple NIC in your system, avahi-autoipd defines the route
for eth0, and then gives warnings for each other interface of the other
NIC.

This can be corrected by taking out the "dev $IFACE" bit from the "ip
route show" command.

Best regards,
Eloi Granado