add media type to hal

[Robert Love]

On Thu, 2004-03-25 at 10:21, Bastien Nocera wrote:

> This page has some explanations of the different kinds of Mixed mode
> CDs:
> http://www.indigorose.com/webhelp/ams50/How_do_I/Create_a_mixed-mode_CD.
> htm
> 
> I think it would be best to tag the CD Extra as mixed as well.

Fine with me, so long as these CD's really have both data tracks (e.g.,
I can mount it as iso9660) and audio tracks (e.g. I can run a CD player
on it).

What policy does magicdev follow?

	Robert Love