HEADS UP: snd_hda MFC plan

[Alexander Motin]

If there will be no objections, I am going to merge latest snd_hda 
driver from HEAD to 7-STABLE next days. Driver was extensively tested by 
many people with numerous hardware on both HEAD and 7-STABLE and 
provides many significant benefits. Discussions can be found on 
multimedia@ list.

The most user-visible difference, is that new driver often provides 
several audio devices even on simple systems. That devices refer the 
different physical or logical audio hardware parts and using different 
hardware connectors. This feature described in details in updated man page.

On most systems having several devices is not a problem, as mostly used 
analog connectors are usually detected first. But on some systems (for 
example, having separate HDMI ports on video cards, which are now also 
supported and often detected first), user may be required to explicitly 
configure his audio applications or by using hw.snd.default_unit sysctl 
globally specify default audio device he wants to use. This moment 
explicitly specified in updated man page and I am going to specify it in 
UPDATING.

-- 
Alexander Motin