discussed with rpe and halex

number of audio* nodes from 3 to 1 on vax, since none of the audio-capable
vax can receive another audio device as expansion (until we get TURBOchannel
support with DMA on VS4k/90).
ok deraadt@ todd@

discussed with jsing and millert

explicitly. OK dlg@ & todd@

Prodded by jmc@.

General huzzahs.
"go for it" deraadt@

ok todd@ krw@ deraadt@

get it in! jsing@

ok jasper@ (also compile tested)

ok miod@, deraadt@, todd@.

ok miod@

all-in-one usb card readers and memory sticks you run out of sd
device files very quickly with default install.
This doesn't affect install media.
ok krw@ miod@

ok miod@ jasper@

"Special purpose devices" section, since a hardware driver which uses
video(4) also could be none-USB as long it uses the V4L2 API.
OK todd@

get it in, deraadt@

ok deraadt@, marco@

prompted by/ok dlg@ deraadt@

grudgingly ok deraadt@

pave the way for future work; ok since this does not change the generated
MAKEDEV

ok miod@

manpage will not look ugly.

- homogenize section order
- sort devices inside sections
- make sure all platforms provide a local target (sigh)
- remove a few dead devices not worth mentioning on a few arches while there.
disabused ok deraadt@

"looks ok" drahn@ deraadt@