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

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

MFH: r260483, r260484, r260594, r260595, r260596, r260597

Improve error message shown to the user when trying to load a module that is
already loaded or compiled withing the kernel
Point the user to dmesg(1) to get informations about why loading a module did fail
instead of printing the cryptic "Exec format error"
Update the BUGS section of kld(4) according the recent changes in kldload(8)

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

Approved by: re (implicit)

Mark up lkm with .Nm, since lkm is name of an api.

Submitted by: ru

Don't reference lkm(4), it doesn't exist.

PR: 108980
Submitted by: Yonatan

Sort sections.

- Add note that loading modules only works if the system
securelevel is less than 1.

PR: docs/58546
Reviewed by: rwatson
Approved by: blackend (mentor)

Hiten's patchset for section four manpages, slightly edited by me.

Delete MAKEDEV references and add small blurb that points to devfs(5)
and devd(8).

PR: docs/50278
Submitted by: Sergey A.Osokin <osa@FreeBSD.org.ru>

Uniformly refer to a file system as "file system".

Approved by: re

Removed whitespace at end-of-line; no content changes. I simply did
cd src/share; find man[1-9] -type f|xargs perl -pi -e 's/[ \t]+$//'

BTW, what editors are the culprits? I'm using vim and it shows
me whitespace at EOL in troff files with a thick blue block...

Reviewed by: Silence from cvs diff -b
MFC after: 7 days

mdoc(7) police: removed HISTORY info from the .Os call.

/modules -> /boot/kernel

PR: 25053
Approved by: nik

Prepare for mdoc(7)NG.

mdoc(7) police: Add a missing .Os.

mdoc(7) police: use canonical form of .Dd macro.

mdoc(7) police: Er macro usage cleanup.

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

Use Fx macro wherever possible.

No be needed here --- "typo".

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.

$Id$ -> $FreeBSD$

Various man page cleanup:

- Sort xrefs
- FreeBSD.ORG -> FreeBSD.org
- Be consistent with section names as outlined in mdoc(7).
- Other misc mdoc cleanup.

PR: doc/13144
Submitted by: Alexey M. Zelkin <phantom@cris.net>

Reference kldfind(2), kldfirstmod(2), kldload(2), kldnext(2), kldstat(2),
and kldunload(2).

Submitted by: Chris Costello <chris@holly.dyndns.org>

Add kld(4) man page. Copyright notice in PR submission was "???", which
I changed to "Christopher G. Demetriou" since the page appears to be a
revision of lkm(4).

PR: docs/8611
Submitted by: Rajesh Vaidheeswarran <rv@fore.com>