altqd and kernel panic

	Hello,

	I have seens some panics on recent kernel when I try to use altqd with 
openvpn.

	Network configuration :
gem0 : WAN interface
tap0 : VPN on gem0 (mainly used for VoIP)
hme[0123] : LAN's

	When tap0 is coming up, openvpn configuration file calls following script :

#!/bin/sh
/sbin/route add -net 192.168.0.0/24 192.168.1.1
/sbin/route add -host gwvoip.ext.nerim.net 192.168.1.1
/sbin/route add -net 79.170.216.0/28 192.168.1.1
/etc/rc.d/altqd onestart
exit 0

	It works without any trouble. When tap0 is deconfigured by openvpn, it 
calls :

#!/bin/sh
/sbin/route delete 192.168.0.0/24
/sbin/route delete gwvoip.ext.nerim.net
/sbin/route delete 79.170.216.0/28
/etc/rc.d/altqd onestop
exit 0

and system randomly panics as altqd stop tries to deconfigure QoS on a 
non existant network interface (tap0).

	My /etc/altqd.conf file :
interface gem0 bandwidth 10M priq

class priq gem0 high_class NULL priority 1
class priq gem0 low_class NULL priority 0 default

filter gem0 high_class 0 1194 0 0 17
filter gem0 high_class 0 0 0 1194 17

interface tap0 bandwidth 10M priq

class priq tap0 high_class NULL priority 1
class priq tap0 low_class NULL priority 0 default

filter tap0 high_class 0 0 0 0 17

	I don't know if this issue is sparc64 specific or not. I have find some 
very old PR.

	Regards,

	JKB