Document the ioctl() argument types for sd(4)'s ioctls

Also, cleanup some lies about which header defines these ioctls

obvious .Pa fixes; found with mandocdb(8)

Delete mention of DIOCWLABEL in sd(4) and vnd(4).

convert to new .Dd format;

i have a bad habit of not documenting extra interfaces i add...

i added an ioctl to get product information from disks. the sd driver
supports it, so say so.

Remove old FreeBSDisms:
- drop the "KERNEL CONFIGURATION" section which is confusing (these are
not pseudo-devices!) except for st.4 where might be worth keeping.
- drop the "DISCLAIMER" section in ch.4.
- mention cdio and chio in cd.4 and ch.4 respectively.

kill default locators

wd(4) devices nowadays also have a ``high level'' interface, we
call it ``ATA''.

ok tom@ deraadt@

remove .Pp's before lists and displays;

remove superfluous ".Sm off";
from wiz@netbsd

typos;

Minor corrections, ok doraadt@

Incomplete section 4 mi manual page cleanup.
- make configuration lines match GENERIC files
- more Xr (hopefully usefule Xr)
- never mention intro(4) on non-physical devices (i.e. protocols), always
mention it for physical devices
- random text style and quoting fixes
- drivers ported from FreeBSD did mention rc.conf instead of hostname.if as
the place to put mediaopt
- some .Tn UNIX -> .Ox replacements
- etc, etc...

reviewd in part by deraadt@ (until he got bored of this)

Powered by @mantoya:
o) start new sentence on a new line;
o) minor mdoc fixes;
millert@ ok

Tip of the day: www.mpechismazohist.com

o) We don't like .Pp before/after .Sh;
o) .Nm always has argument in .Sh SYNOPSIS;
o) We always closes .Bl and .Bd tags;

millert@ ok

o) remove unnecessary .Pp;
o) remove unnecessary .Nm args;
o) closes .Bl;
o) .Sh AUTHOR -> .Sh AUTHORS;
o) sort SEE ALSO;
o) better -mdoc style;
o) typos;

aaron@ ok.

NetBSD -> .Nx
FreeBSD -> .Fx

first sweep ...
OpenBSD -> .Ox
NetBSD -> .Nx
FreeBSD -> .Fx
--
Ok'd by aaron@

- remove all trailing whitespace
* except when it is escaped with a `\' at the end of the line
- fix remaining .Nm usage as well
- this is from a patch I received from kwesterback@home.com, who has been
working on some scripts for fixing formatting errors in mdoc'd man pages

Ok, so there could be a cost/benefit debate with this commit, but since I have
the patch we might as well commit it...

Move ncr.4 out of man4.i386/ncr.4 and update it from NetBSD.
Remove one of the tekram cards from man4.i386/aha.4 that is really
ncr-based and add cd.4, fpa.4, sd.4, st.4, uk.4 from NetBSD
(some originally from FreeBSD).