net/mpd5: proxy arp don't work on FreeBSD 8

[Anton Yuzhaninov]

mdp can't add proxy arp record. From mpd logs:

Mar  1 15:10:34 x0001 mpd: [B-1] IFACE: Add address 10.25.1.240/32->10.25.1.241 to ng0
Mar  1 15:10:34 x0001 mpd: [B-1] exec: /usr/sbin/arp -S 10.25.1.241 0:15:17:35:1c:22 pub
Mar  1 15:10:34 x0001 mpd: [B-1] system: command "/usr/sbin/arp" returned 256

Same command from shell:

# arp -S 10.25.1.241 0:15:17:35:1c:22 pub
delete: cannot locate 10.25.1.241
cannot intuit interface index and type for 10.25.1.241

FreeBSD version - RELENG_8 from 2010-02-15 (this changes
http://svn.freebsd.org/changeset/base/201614 included in used version)

-- 
WBR,
 Anton Yuzhaninov