netstat output changes in 8.0?

[Nick Rogers]

Before 8.0-RELEASE, if I ran netstat -rn, it listed a separate route for
each host on the network, along with its MAC address. For example ...

172.20.172.17      00:02:b3:2f:64:6a  UHLW        1     105712   1500
 vlan172    595
172.20.172.20      00:1e:c9:bb:7c:a9  UHLW        1       1002   1500
 vlan172    598
172.20.172.22      00:14:5e:16:bb:b6  UHLW        1        107   1500
 vlan172    491

This behavior seems to have changed in 8.0, where now only the
locally-assigned IP addresses and related CIDRs are displayed.

Is there any way to get this behavior back, perhaps with a new flag that I
am not able to find? Or some sysctl? I have a script that was relying on
each host's "expire" flag in the routing table to determine when the MAC
address first appeared on the network according to ARP.