more Core dependency data

[Josh Boyer]

On Tue, 2006-06-13 at 09:48 -0400, Chip Coldwell wrote:
> 
> > sg3_utils
> 
> Very useful for discovering what a particular scsi generic device is

And it can be just as useful in Extras as it was/is in Core.

Usefulness is not a good metric to determine if something needs to be in
Core.

josh