itojun@iijlab.net writes:

> 	since we ship userland in binary form, we need to always
> 	enable IPv6 for userland (otherwise, users would need to
> 	recompile the whole userland when he turns on IPv6).

btw, since now sys_init tries to open v6 sockets and exits if failed
to open it, the binary won't work on v4 only kernel.

enami.