polluting ramdisks with devices that aren't needed there.

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

ok deraadt, miod

explicitly. OK dlg@ & todd@

Prodded by jmc@.

General huzzahs.
"go for it" deraadt@

ok todd@ krw@ deraadt@

get it in! jsing@

ok miod@, deraadt@, todd@.

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@

"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@

please commit from deraadt@

prompted by/ok dlg@ deraadt@

grudgingly ok deraadt@

sparc.
ok miod@

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

to the appropriate sections. No functional change, except for the manpage
being nicer.

being handmade in std).
spotted by jmc@, ok deraadt@

- refer to the section 4 manual page for every device target, whenever
possible
- repair a few minor quoting errors
- repair a few sorting errors
- fix a few device descriptions (ideally they would be synched with the
.Nd line of their manpages, but we are not there... yet)
- minor mdoc fixes
Thanks to jmc@ for review and a lot of constructive criticism.

- 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@

ioctl(2), an unprivileged process may allocate a pty and have its owner
and mode set appropriately.  This means that programs such as xterm and
screen no longer need to be setuid.  Programs using the openpty()
function require zero changes and will "just work".
Designed by beck@ and deraadt@; changes by beck@ with cleanup (and
a rewrite of the vnode bits) by art@ and tweaks/bugfixes by me.
Tested by many.

pointed out by todd@

ok miod@

Tested by various people on various platforms, I'm willing to fix any
breakage this causes.
ok niels@ deraadt@ and mickey@ (after his comments were applied)