Bring the wd.4 manpage into the world of 4.0:

Spell diskcontroller as disk controller.

There is no more CMD640 option.

bad144 got axed.  Reflect change.

Contract the /dev entries to one /dev/wd* entry which we call
wd device nodes to reflect the merger of character and block
devices.

Add small line to NOTES stating that wd will some be replaced
completely by ata/ad.

Suggested by:	bde

share/man/man4/man4.i386/wd.4

@@ -32,14 +32,11 @@
 .Sh NAME
 .Nm wd
 .Nd
-Generic WD100x/IDE diskcontroller driver
+Generic WD100x/IDE disk controller driver
 .Sh SYNOPSIS
 .Cd "device wdc0 at isa? port IO_WD1 irq 14" Op flags Ar flags
 .Cd device wd0 at wdc0 drive 0
 .Cd "device wd1 at wdc0 drive 1" Op flags Ar flags
-.Pp
-For the CMD640b IDE controller:
-.Cd "options"  CMD640
 .Sh DESCRIPTION
 This driver provides access to disks connected to controllers that emulate
 the Western Digital WD100x series. This range of controllers includes WD1003
@@ -77,28 +74,14 @@ sectors attempted is (flags & 0x00ff).
 The flags can be specified on the line for the drive as a 16 bit int,
 or on the controller line as a 32 bit int, where the top 16 bit is
 relevant to the highest numbered drive.
-.Pp
-The
-.Dq Dv CMD640
-configuration option
-enables a workaround for a deficiency of the CMD640b IDE controller.
-If this option is enabled and the chip is detected by the PCI subsystem,
-the primary and secondary controller will not be used simultaneously.
 .Sh FILES
 .Bl -tag -width Pa -compact
 .It Pa /dev/wd*
-disk block device nodes 
-.It Pa /dev/rwd*
-disk character device nodes
+wd device nodes
 .It Pa /sys/i386/conf/GENERIC
 sample generic kernel config file for (a.o.) wd based systems
 .It Pa /sys/i386/isa/wd.c
 driver source
 .El
-.Sh SEE ALSO
-.Xr bad144 8
 .Sh NOTES
-This controller/disk combo has no provisions for automatic bad block handling.
-You need to run 
-.Xr bad144 8
-to check for bad blocks.
+This driver will soon be completely replaced by the ata and ad drivers.