Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Copy head to stable/9 as part of 9.0-RELEASE release cycle.

Approved by: re (implicit)

Set magic fbsd:nokeywords property that allows files to bypass
keyword expansion. (file-specific replacement for CVSROOT/exclude)

Replace a rarely used "depuration" with "debugging".

PR: docs/85127
Submitted by: Gary W. Swearingen (partially)
MFC after: 3 days

Remove references to NMBCLUSTERS which is obsoleted.

PR: 100427
Approved by: maxim
MFC after: 1 week

Add loader(8) variables for RB_DFLTROOT, RB_MUTE, and RB_PAUSE:
"boot_dfltroot", "boot_mute", and "boot_pause" respectively.

remove a pointless comment with a more helpful one...

Submitted by: Tobias Roth
MFC after: 5 days

Extend `autoboot_delay' handling - is this variable is set to -1 don't allow
user to interrupt autoboot process at all. Currently, even when
`autoboot_delay' is set to 0, loader(8) still allows autoboot process to be
interrupted by pressing any key on the console when the loader reads kernel
and modules from the disk. In some cases (i.e. untrusted environment) such
behaviour is highly indesirable and user should not be allowed to interfere
with the autoboot process at all.

Sponsored by: PBXpress Inc.
MFC after: 3 days

document host_start_mem.

# feel free to wordsmith.

Suggested by: ru@

Back out changes which were introduced to delay mounting root file system.
Those changes were made on gmirror needs, but now gmirror handles this
by itself.

(forced commit) Previous revision documented the "bcachestat" command.

The "autoboot" command also has a third (optional) parameter.

Don't give instructions on how to disable ACPI in the MI section.
For novice users, beastie.4th can just do it. Expert users can
read ACPI instructions by typing "help ACPI".

Fixed the default value of the $prompt variable, document what
happens if $prompt is unset.

Mention "help index" in the online help, and provide a help for
the `?' command.

Document boot_cdrom, boot_multicons, and boot_serial.
Reduce diffs between help.common and loader(8).
Mention that boot_userconfig is currently a no-op.

Document vfs.root.mountdelay value.

Reminded by: ru

Retire hw.pci.allow_unsupported_io_range.

PR: bin/70533
Submitted by: Gavin Atkinson

remove /boot/kernel from the default path.. There is already code that
will prepend the current kernel booting... This prevents a problem of
loading /boot/kernel's modules when a different kernel has no modules,
but you left your module_load="YES" in loader.conf...

Reviewed by: dcs (minus the help part)

Correct a documentation bug.

Approved by: jhb

Rename the kern.vm.kmem.size tunable to the more logical vm.kmem_size. To
assure backward compatibility (conditional on !BURN_BRIDGES), look it up
by its old name first, and log a warning (but accept the setting) if it
was found. If both the old and new name are defined, the new name takes
precedence.

Also export vm.kmem_size as a read-only sysctl variable; I find it hard to
tune a parameter when I don't know its default value, especially when that
default value is computed at boot time.

Since we insist on loading the POS ACPI by default, give the poor user
instructions on the main help screen for disabling it.

Fix a few spelling errors.

Submitted by: Stefan Farfeleder <stefan@fafoe.dyndns.org> via -doc.

Document the tunable kern.ipc.nsfbufs in help.common and loader.8. Small
nearby grammar fixup that saves a line of display while in the loader
(help set tunables), but reuses the line for kern.ipc.nsfbufs.

Approved by: roam

FreeBSD 5.0 has stopped shipping /modules 2.5 years ago. Catch
up with this further by excluding /modules from the (default)
kern.module_path.

Minimally document hw.syscons.sc_no_suspend_vtswitch.

Requested by: Nate Lawson <nate@root.org>

Eliminate references to defunct kernel tunables.

Approved by: re
PR: bin/43343

Document loader tunables hw.pci.enable_io_modes and
hw.pci.allow_unsupported_io_range.

Submitted by: Hiten Pandya <hiten@angelica.unixdaemons.com>
Approved by: re (murray)

Loader tunable 'machdep.disable_mtrrs'.
Sysctl of same name to reflect status.

Submitted by: jhb
Approved by: re (murray)
MFC after: 1 day

Change help documentation for bootfile and module_path to reflect
the actual code. Both use a ";" (not a ",") to delimit entries.

PR: 39679
Submitted by: Cyrille Lefevre <cyrille.lefevre@laposte.net>
MFC after: 3 days

The entry for the 'set' command no longer has a list of variables.

PR: 32454
Submitted by: Gary W. Swearingen <swear@blarg.net>
MFC after: 3 days

Some more i386-only BIOS-friendliness:

- Add support for using the PCI BIOS functions for configuration space
accesses, and make this the default.

- Make PNPBIOS the default (obsoletes the PNPBIOS config option).

- Add two new boot-time tunables to disable each of the above.

Update to reflect use of : not ; as separator in paths passed to the
kernel.

Document the hw.physmem tunable. (There should be arch-specific tunable
help sections.)

Make the location of init(8) tunable at boot time.

Fix syntax for boot command

Noticed by: Ruslan Ermilov <ru@ucb.crimea.ua>

Make use of prototypes to silence warnings.

Change include() so it will be able to load files with forth code,
instead of just builtins. Remove #@- from the include section of the
help file, since they don't work in the new version of include, unless
BOOT_FORTH is not defined.

Change bf_run() so it will return the result returned by ficlExec(). Also,
make bf_run() push "interpret" to be executed by ficlExec(), since ficlExec()
doesn't do it by itself. (Things worked previously because nothing
recursed through ficlExec() by the way of bf_run()).

Change/extend comments on builtin behavior.

Search for "interpret" at the end of bf_init(), so /boot/boot.4th can
provide it's own version.

Remove dead code.

Mention the net.inet.tcp.tcbhashsize tunable.

Whoops! Forgot to include Mr. Sobray's more command in the last set
of commits.

Submitted by: Daniel C. Sobral <dcs@newsguy.com>

Document the machdep.pccard.pcic_irq tunable, which allows the user to tune
the interrupt which will be given to the PCIC. If the value supplied is
illegal or not available, interrupts will be turned off and polled mode
used instead.

bootstrap.h
help.common
interp.c
Rename the 'source' command to 'include' in order to avoid conflict
with the ANS Forth command of the same name. (kern/9473)

interp_forth.c:
Changes from kern/9412 (EXCEPTION word), kern/9442 (TIB buffer
sizing) and an improved version of kern/9460 (set
version numbers).

load_aout.c:
Trim some obsolete #if 0'ed cruft.

pnp.c:
Tidy the pnpscan output, turn off the module scanning until we
sort out how to do it right.

PR: kern/9412 kern/9442 kern/9460 kern/9473
Submitted by: PRs from Daniel Sobral <dcs@newsguy.com>

Add 'set tunables' help, list the kernel tunable values that can currently
be overridden.

Reformat help to improve subtopic display appearance, other minor
cleaning. The 'help' command in the loader should now be usable and
hopefully informative.

Build the composite help file from the generic and architecture-specific
help files, sorting topics and subtopics to allow maximum flexibility.

Add documentation for $rootdev.

- Add a new command 'lsdev' to list devices which might be likely to host
filesystems.
- New 'help' command and data in the help.* files (not yet installed),
provides topic and subtopic help, indexes, etc.
- Don't crash if the user tries to set an invalid console. Be helpful
instead.
- Expand tabs (badly) on the i386 video console.
- Some minor cosmetic changes.