[pkg-lighttpd] Bug#560837: IPv6... be flexible about user configuration

[Frank Lin PIAT]

Hello dear developers,

I was testing lighttpd and got hit by this bug. I read the thread and I
think that you are all right:

1. People upgrading existing systems expect smooth upgrade.
2. Fresh installed system are IPv6 enabled.
3. Disabling IPv6 on a new system should be possible and easy.

Regarding the point #1, Debian provides appropriate infrastructures
(NEWS.Debian and/or debconf), to warn system admins that a substantial
changed occurred, and they should review/prevent/accept that change.

My 2¢,

Franklin