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)

Do nextboot -D twice during boot. The first time in rc.d/root which ensures that
we can remove the file as early as possible, but shut up nextboot at this moment
if the operation is failed, because /boot is not necessarily a part of /; the
newly added second run is placed in rc.d/mountlate after all filesystems were
mounted.

Discussed at: -rc@
Suggestions from: brooks, mtm
MFC after: 1 month

Remove $NetBSD$ CVS tags. We no longer attempt to synch our rc.d files
with theirs, so this information doesn't need to be in the live file.
Having it in our CVS history is enough.

o Implement the stop_boot subroutine [1]. This subroutine can be used by
scripts in rc.d to stop rc(8) from booting into multi-user mode when
a critical or severe error condition is encountered.

o Modify scripts in etc/rc.d that already implemented this functionality
independently.

o Document it.

[1] - This subroutine was implemented in FreeBSD in rc.d/fsck. I moved it
to rc.subr(8). Our version differs slightly in that it takes an
optional argument to stop the boot even if "autoboot" is not set.

Obtained from: NetBSD
MFC after: 2 weeks

Check if /sbin/nextboot exists before running it.

PR: 93466
Submitted by: Mats Palmgren

Tell nextboot to clean up after itself.

Marius Nuennerich pointed out that nextboot(8) configured boot options
were now sticky. This script was deleting /boot/nextkernel on boot, but
there is no code in the tree that creates that file since revision 1.15
of src/sbin/reboot/reboot.c.
nextboot(8) creates /boot/nextboot.conf, so remove that instead.

Approved by: jhb (proxy mentor)
MFC after: 1 week

"-o rw" is invalid and undocumented mount option that
is only present for fstab(5) compatibility, and is
otherwise ignored by mount(8) (not passed to mount_*
programs, and not passed to nmount(2)).

"-u -o rw" worked with an old mount(8) with mount_ufs.c
because "-o rw" was stripped and simple "-u" caused an
update of UFS from read-only to read-write, due to
inability of mount(2) to track changes in options
(MNT_RDONLY is either set or not).

"-u" no longer causes the transition from RO to RW,
now that mount(8) was converted to use nmount(2), so
an explicit change to RW is required. Keep up with
this change, and use "-uw" to mount root read-write.

Remove the requirement for the FreeBSD keyword as it no longer
makes any sense.

Discussed with: dougb, brooks
MFC after: 3 days

Mark scripts as not usable inside a jail by adding keyword 'nojail'.

Some suggestions from: rwatson, Ruben de Groot <mail25@bzerk.org>

Luke Mewburn has indicated that they (NetBSD) are not interested
in keeping the scripts under rc.d in sync with us. So, remove
NetBSD specific stuff (which made our scripts more complicated
than necessary).

The NetBSD ident string will be left intact, both for history and
also incase we wish to pull in future versions.

Luke Mewburn has indicated that they (NetBSD) are not interested
in keeping the scripts under rc.d in sync with us. So, begin removal
of NetBSD specific stuff (which made our scripts more complicated
than necessary), starting with the NetBSD KEYWORD.

If rc.d/mountcritlocal is unable to mount local filesystems,
then immediately terminate the shell (during boot this
also terminates the parent rc(8) shell). This was the pre-rcNG behaviour.

Also, remove an extraneous mount /.

PR: conf/57659
Submitted by: yar (with modifications)

Wrap test case in an if statement to avoid crunching a return value.

Fix style bugs:
* Space -> tabs conversion.
* Removed blanks before semicolon in "if ... ; then".
* Proper indentation of misindented lines.
* Put a full stop after some comments.
* Removed whitespace at end of line.

Approved by: silence from gordon

Convert from `${CMD_OSTYPE}` to ${OSTYPE}. This saves a shell invocation on
OS-dependent case switches.

Merge in all the changes that Mike Makonnen has been maintaining for a
while. This is only the script pieces, the glue for the build comes next.

Submitted by: Mike Makonnen <makonnen@pacbell.net>
Reviewed by: silence on -current and -hackers
Prodded by: rwatson

This commit was generated by cvs2svn to compensate for changes in r78344,
which included commits to RCS files with non-trunk default branches.

Import the NetBSD 1.5 RC system.

Note that `rc' and `rc.shutdown' could not be imported because we already
have files with those names.