Is IPV6 option still necessary?

[abi]

09.10.2019 09:15, Baptiste Daroussin пишет:
>> I'm writing from 2019 and I build kernel and ports without IPv6. For all
>> this years I fail to understand why I need it.
>>
>> My home devices fit 10.0.0.0/16 nicely, I have faith in NAT and I
>> encountered no IPv6-only sites.
>>
>> But I saw CVEs in IPv6 stack.
> Plenty of FreeBSD things are ipv6 only in the FreeBSD cluster. In particular if
> you do look at the build machines in the cluster, no ipv6 will mean no access to
> the build log in case of failures.
>
> I agree I don't see the reason why we should keep that ipv6 option. When off
> this option does not bring much value to the users as the code for apps to
> support ipv6 mostly reside in the libc. Actually that was my intent in 2012 to
> first turn it on by default everywhere and then drop the option entirely.

Are you going to keep IPv6 kernel option? If off and ports can detect 
ipv6 availability in

runtime, I don't see problem at all.