Re: if_bridge(): IPv6 EUI-64 seemingly not working

FreeBSD User:
> net.link.bridge.inherit_mac: 1
> [...]
> 
>         ether 4c:52:62:2b:05:eb
>         inet6 fe80::5a9c:fcff:fe00:393a%bridge0 prefixlen 64 scopeid 0x6

i was able to reproduce this:

# sysctl net.link.bridge.inherit_mac=1
net.link.bridge.inherit_mac: 0 -> 1
# ifconfig bridge1 create inet6 -ifdisabled auto_linklocal up
# ifconfig bridge1 | egrep 'ether|inet6'
	ether 58:9c:fc:10:43:03
	inet6 fe80::5a9c:fcff:fe10:4303%bridge1 prefixlen 64 scopeid 0xa
# ifconfig epair create
epair2a
# ifconfig bridge1 addm epair2a
# ifconfig bridge1 | egrep 'ether|inet6'
	ether 02:36:0f:34:6b:0a
	inet6 fe80::5a9c:fcff:fe10:4303%bridge1 prefixlen 64 scopeid 0xa

some observations:

- i don't think this is caused directly by the member_ifaddrs changes.

- you can work around the problem by manually setting the bridge link
  address when creating it instead of using inherit_mac, i.e.:
	  ifconfig bridge1 create link 02:00:00:00:00:01

- i don't think this is a bug per se, it's more that we simply don't
  update the IPv6 lladdr when an interface's MAC address changes.
  but i've copied net@ in case anyone else has an opinion on this.

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