kern/49197: A link local address of vlan remains after ifconfig -vlanif

[ozaki-r%netbsd.org@localhost]

>Number:         49197
>Category:       kern
>Synopsis:       A link local address of vlan remains after ifconfig -vlanif
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Sep 12 09:40:00 +0000 2014
>Originator:     Ryota Ozaki
>Release:        current
>Organization:
>Environment:
NetBSD kvm 7.99.1 NetBSD 7.99.1 (KVM) #16: Fri Sep 12 17:11:06 JST 2014  
ozaki-r@(hidden):(hidden) amd64

>Description:
Read the title and see the below example.
>How-To-Repeat:
kvm# ifconfig vlan0 create
kvm# ifconfig vlan0
vlan0: flags=8802<BROADCAST,SIMPLEX,MULTICAST>
kvm# ifconfig vlan0 vlan 10 vlanif wm0
kvm# ifconfig vlan0 -vlanif wm0
kvm# ifconfig vlan0
vlan0: flags=8802<BROADCAST,SIMPLEX,MULTICAST>
        inet6 fe80::5054:ff:febb:1846%vlan0 prefixlen 64 detached scopeid 0x5

>Fix:
n/a