Introduce a flag to disable PDMA when writing.

The use of pdma when writing would always cause a panic on my Powerbook 160,
possibly others as well.

As posted to tech-kern.

Add explanation for the sbc flags to the kernel configurations that
use the sbc 53c80 driver. Until now, this information has lived in the
source code, only; neither sbc nor ncrscsi have a man page.

Triggered by PR port-mac68k/2921

branches: 1.31.52;
The {GENERIC,INSTALL}SBC kernel configurations are out of sync with
the vanilla ones. They are supposed to be identical to
{GENERIC,INSTALL}, apart from the different ncr5380 driver.
Instead of re-sync'ing, use a new feature of configure and just disable
the ncrscsi driver.

(Approved by Allen Briggs)

remove MALLOC_NOINLINE, it doesn't do anything anymore.

branches: 1.29.14; 1.29.16;
Remove 'count' argument for pseudo-devices that ignore it
(vnd, bpfilter, ppp, gif, gre, tun, sl, strip, faith, stf).

bpfilter doesn't accept count anymore.

branches: 1.27.2; 1.27.4; 1.27.6;
Remove obsolete options VNODE_OP_NOINLINE.

Adjust comments for options FFS_NO_SNAPSHOT.

XXX: This option should be mentioned in options(4).

Enable ptyfs by default on the non-install and non small/tiny/ramdisk kernels

branches: 1.24.6;
Invert FFS_SNAPSHOT to FFS_NO_SNAPSHOT

Add 'option FFS_SNAPSHOT' to most of the config files.
Commented out for kernels that appear to hace space constraints.

Add file system snapshots to kernel configs.

- Ffs internal snapshots get compiled in unconditionally.

- File system snapshot device fss(4) added to all kernel configs that
have a disk. Device is commented out on all non-GENERIC kernels.

Reviewed by: Jason Thorpe <thorpej@netbsd.org>

branches: 1.21.2;
only one of the obio locators was actually used, so get rid of the others
and collapse the two variations of obio into one. use the remaining locator
("addr") to differentiate the two possible esp and sbc devices (instead of
using the unit number).

branches: 1.20.4;
Add COMPAT_BSDPTY to the rest of the config files.

Add "options SYSCTL_INCLUDE_DESCR" to a lot of configs, but commented
out in most of them.

branches: 1.18.2;
Use one 'atabus* at ata?' instead of multiple 'atabus* at FOOide? channel ?'
Use 'atapibus* at atapi?' instead of 'atapibus* at atabus?'

Add atabus.

add COMPAT_15/COMPAT_16

add rnd(4) device to installation media.
necessary for many purposes, including password seeding, tcp sequence number,
and more. see tech-security

branches: 1.14.2;
Bye Bye UCONSOLE

enable USERCONF by default; it's small and extremely useful to have available.

Ensure all INSTALL config files consistantly include PIPE_SOCKETPAIR,
MALLOC_NOINLINE, and VNODE_OP_NOINLINE. The exceptions are when they
include another config files that already defines the options, or if
they are for an embedded board, just define a few extra options, and
do not already define PIPE_SOCKETPAIR.

Add support for DHCP network configuration.

add netdock ether driver. as discussed on port-mac68k

branches: 1.9.2; 1.9.4;
Add IDE drive support.

Note:
(1) Character device major number chages to 49 from 48(in my original
code). So it is necessary to rebuild device files.
(2) Must use Booter 2.0.0a10 or later.
(3) Default mode is cpu busy wait. It is defined by flags 0x1000.
It will be more slow than before.
No flags means hardware interrupt mode. But it might be able to
get no interrupts.

Support machines:
(1) Quadra 630 series
(2) PowerBook 150

Non tested machine:
(1) PowerBook 190 series

Approved by: briggs

Add the INCLUDE_CONFIG_FILE option to all config files. In config
files that are generic (ie, GENERIC, GENERICSBC, GENERIC32, ALL, or
ALPHA), it is uncommented.

Add commented-out USERCONF option. Mainly useful for install media
and can be optionally enabled based on miniroot and ramdisk size
requirements.

branches: 1.6.2;
Rename MEMORY_DISK_SIZE (formerly MINIROOTSIZE) to MEMORY_DISK_ROOT_SIZE,
which was suggested by Izumi Tsutsui <tsutsui@ceres.dti.ne.jp> as
being more consistent with what it's controlling...

* rename MINIROOTSIZE to MEMORY_DISK_SIZE, so that all md(4) options
are now consistently named
* fold opt_mdsize.h into opt_md.h

add options PIPE_SOCKETPAIR to individual kernel configs
the option is commented out on everything but kernels I was able
to recognize as INSTALL-like or ones for small memory machines

cleanup:
options SPACE TAB
makeoptions TAB
psuedo-device TAB
remove trailing whitespace
replace multiple spaces -> tabs
options "FOO" -> options FOO
options "FOO=bar" -> options FOO=bar
options "FOO=\"bar\"" -> options FOO="\"bar\""

branches: 1.2.4;
Nit -- this kernel is called "INSTALLSBC", not "INSTALL".

branches: 1.1.2; 1.1.4; 1.1.6;
Fix PR port-mac68k/11343