MFC r315560:

Document how to use reroot with NFS.

Sponsored by: DARPA, AFRL

Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, as nothing has been merged
here.

Additional commits post-branch will follow.

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

kenv(8) -> kenv(1)

MFC after: 1 month
Sponsored by: The FreeBSD Foundation

Add flag to disable inital reboot(8) userland sync

Add -N flag to reboot(8) which bypasses the userland sync(2) during
reboot(8) while still allow the kernel sync during the reboot(2) syscall
to occur.

An example use of this is when rebooting with disconnected iSCSI sessions
which would otherwise cause the reboot to hang on BIOs that will never
complete.

Reviewed by: bjk
MFC after: 2 weeks
Sponsored by: Multiplay
Differential Revision: https://reviews.freebsd.org/D4449

Userspace part of reroot support. This makes it possible to change
the root filesystem without full reboot, using "reboot -r". This can
be used to to eg. boot from a temporary md_image preloaded by loader(8),
setup an iSCSI session, and continue booting from rootfs mounted over
iSCSI.

Reviewed by: kib@, bapt@
MFC after: 1 month
Relnotes: yes
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D3693

Remove stale reference to wtmp(5).

Reported by: pluknet

Remove stale references to utmp(5) and its corresponding filenames.

I removed utmp and its manpage, but not other manpages referring to it.

Cross-reference nextboot(8).

MFC after: 3 days

Sync program's usage() with manpage's SYNOPSIS.

Remove advertising clause from University of California Regent's license,
per letter dated July 22, 1999.

Approved by: core, imp

english(4) police.

mdoc(7) police: Nits.

Approved by: re

Document behaviour change in reboot(8) introduced in reboot.c rev. 1.17:
when using '-p' with reboot, and the power down action failds, reboot
the system normally. The behaviour of 'halt -p' and of shutdown(8) is
unchanged.

Approved by: roberto

s/filesystem/file system/g as discussed on -developers

The .Nm utility.

mdoc(7) police: nits.

more file system > filesystem

Add a -k option to reboot to specify the kernel to boot next time
around. If the kernel boots successfully, the record of this kernel
is erased, it is intended to be a one-shot option for testing
kernels.

This could be improved by having the loader remove the record of
the next kernel to boot, it is currently removed in /etc/rc immediately
after disks are mounted r/w.

I'd like to MFC this before the 4.6 freeze unless there is violent
objection.

Reviewed by: Several on IRC
MFC after: 4 days

Remove whitespace at EOL.

Document the -l option.

PR: docs/27440
Submitted by: Flix-Antoine Paradis <reel@sympatico.ca>

mdoc(7) police: use the new features of the Nm macro.

Remove single-space hard sentence breaks. These degrade the quality
of the typeset output, tend to make diffs harder to read and provide
bad examples for new-comers to mdoc.

Add `.Nm fastboot' and `.Nm fasthalt' to NAME section.

Add a "-d" option which causes the system to generate a crash dump.

$Id$ -> $FreeBSD$

Clarify some details.

Correct use of .Nm. Add rcsid. -Wall. Add -p flag in usage string (was missing).

Add support to halt, to allow it to request that the power be turned off
(the RB_POWEROFF flag)

Correct a bunch of man page cross references and generally
try and silence "manck".

ncurses, rpc, and some of the gnu stuff are still a big mess, however.

Install aliases "fasthalt" and "fastboot" for halt and boot respectively.
This is for "backwards compatibility". Documented these aliases in the
manual page.

This commit was generated by cvs2svn to compensate for changes in r1558,
which included commits to RCS files with non-trunk default branches.

BSD 4.4 Lite sbin Sources

Note: XNSrouted and routed NOT imported here, they shall be imported with
usr.sbin.