IPv6 support

[任晓磊]

2010/2/1 Edho P Arief <edhoprima at gmail.com>:
> yes, you need to specify both.
>
> listen 80;
> listen [::]:80;
If I don't specify "default ipv6only=on", I would get

[emerg]: bind() to 0.0.0.0:80 failed (98: Address already in use)
[emerg]: bind() to 0.0.0.0:80 failed (98: Address already in use)
[emerg]: bind() to 0.0.0.0:80 failed (98: Address already in use)
[emerg]: bind() to 0.0.0.0:80 failed (98: Address already in use)
[emerg]: bind() to 0.0.0.0:80 failed (98: Address already in use)
[emerg]: still could not bind()

How's this going on?
-- 
Ren Xiaolei