Re: route ipv6 errors on bootup in -current main-n267425-aa1223ac3afc on arm64

From: void <void_at_f-m.fm>
Date: Tue, 09 Jan 2024 10:24:53 UTC 
On Mon, Jan 08, 2024 at 01:07:30PM -0800, Enji Cooper wrote:
>
> Was the kernel/utility built with IPv6? If not, that’s a general 
> bug which should be filed (which can be easily checked/avoided 
> using the FEATURES(9) subsystem)…
> Cheers!
>-Enji

world/kernel was built with WITHOUT_INET6= in /etc/src.conf

I made the problem go away with removing WITHOUT_INET6= and rebuilding.
The system was installed by taking 
FreeBSD-15.0-CURRENT-arm64-aarch64-RPI-20240104-8bf0882e186e-267378.img
and dd-ing it to a usb3-connected hd.

Where can I read about features?

% man features
No manual entry for "features"

it's not in apropos
thanks,
--