IPv6 over gif(4) broken in 6.2-RELEASE?

[Dimitry Andric]

Bruce A. Mah wrote:
>>  I remember Dimitry Andric reported the same problem on -stable on 30
>>  Dec, and after he reverted rev.1.48.2.16 it worked fine again.  Do
>>  you have the symptom even on 6.2-RELEASE?  Since RELENG_6_2_0_RELEASE
>>  did not have the change, I thought there was no problem.
...
> On my 6-STABLE system (which appears to be working fine), I still have
> the change from 1.48.2.16, I only backed out .15 and .14.  I didn't try
> my diff on the 6.2-RC2 and 6.2-RELEASE machines yet.
> 
> Hmmm...I was looking for that bug report before, but I couldn't find it.
>  It's not clear to me how 1.48.2.16 is involved...hmmm...

I originally reported this here:
http://lists.freebsd.org/pipermail/freebsd-stable/2006-December/031809.html

and later I found out it was caused by commit 1.48.2.16:
http://lists.freebsd.org/pipermail/freebsd-stable/2006-December/031853.html

I'll shoot in a regular PR later tonight...