Fix various typos, mainly in comments.

swwdog(4): Add to GENERIC kernels.

Plus a handful of others that I'm familiar with. Lots of special-
purpose kernels should probably have this too but I'm not going
through all the arm, mips, and ppc evaluation board kernels to see
which ones are relevant.

Omitted from systems I know to be very small:
- sun2/GENERIC
- dreamcast/GENERIC
Feel free to remove it from others that need to be kept smaller.

Compile-tested a few of these just in case:
- alpha/GENERIC
- amd64/GENERIC
- evbmips/OCTEON
- i386/GENERIC
- riscv/GENERIC

PR kern/29702

UFS/LFS dirhash:
- Enable UFS_DIRHASH if the architecture or kernel model specific config
file can use 128MB of RAM or more.
- Remove experimental tag from UFS_DIRHASH; it's been with RUMP kernel
and by a number of NetBSD developers for years.
- Add LFS_DIRHASH if LFS was enabled.
- Be somewhat consistent with FS options order.

Unreference IPF/PF from all the config files, and enable NPF instead when
wanted. This also fixes some inconsistencies I saw in several files (eg
IPF options while IPF was not compiled, IPF+PF enabled by default, etc).

branches: 1.25.6; 1.25.30; 1.25.32;
Adapt to current (and new pkgsrc toolchain)

Bring back the playstation2 port - now that a toolchain for it is
available again.

branches: 1.23.10; 1.23.16;
Remove support for NetBSD/playstation2.

branches: 1.22.4;
Remove softdep, pass 1. We are focused on improving journalling.

Proposed on tech-kern@.

branches: 1.21.2;
Add "options WAPBL" to standard GENERIC/INSTALL type configs.

branches: 1.20.36; 1.20.40; 1.20.42; 1.20.46;
It doesn't make sense to specify "configuration" and "interface"
locators for uhub because a hub can't have sub-devices.
This might be sanity-checked eventually.
Same for ubt now after the change to device attachment.

branches: 1.19.14; 1.19.18; 1.19.20;
Add stf to all kernel configs which have INET6 and gif, except the INSTALL
ones and those for specific machines of developers. PR 32304.

OK'ed by rpaulo.

N.B. stf is a cloning device, so it still must be enabled by
"ifconfig stf0 create".

branches: 1.18.2; 1.18.4; 1.18.6;
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: 1.16.2; 1.16.4; 1.16.6;
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

revert "defflag VMSWAP" changes for now.
there seems to be far more people who don't want to edit
their kernel config files than i thought.

add "options VMSWAP" to non INSTALL kernels.

branches: 1.11.6;
Add FFS_NO_SNAPSHOT - commented out in XEN

branches: 1.10.8; 1.10.10;
Use one 'atabus* at ata?' instead of multiple 'atabus* at FOOide? channel ?'
Use 'atapibus* at atapi?' instead of 'atapibus* at atabus?'

Add adabus.

branches: 1.8.2;
Add pseudo-device ksyms.

Enable "pseudo-device clockctl" in all kernels, except
installation related kernels (INSTALL* and RAMDISK*).
This enables rc.conf(5) $ntpd_chroot to be used "out of the box"

branches: 1.6.2; 1.6.10; 1.6.12;
Update for new uhidev device attachment.

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: 1.4.2;
The wsmux pseudo device does not need a count anymore.

increase maxusers (8->16)

add wsmux to build kernel.

playstation2 port