Two cd9660 patches

[Tim Kientzle]

Do you have tests for these?

J.R. Oldroyd wrote:
> I have posted two patches two the cd9660 fs.
> 
> kern/128934 fixes a sign-extension bug that impacts the handling of
> 	non-GMT dates that are west of GMT.
> 
> kern/128942 adds additional tags in the Rock Ridge ER (extension record),
> 	tags which were defined by the standard fourteen years ago!
> 
> Both changes are small and are already included in the other *BSDs and
> in Linux, so they should be non-controversial here.
> 
> I'm looking for a fs committer to review these, please.  I'd also like
> to see them MFC'd to 7-stable.
> 
> Thanks.
> 	-jr
>