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)

Fix a bunch of typos and spelling mistakes.

Forgot to mention that the last revision was fix for:

PR: docs/106315
MFC-after: 3 days
Approved by: trhodes (mentor)

- Do not claim that ipfw is the only firewall package available
in FreeBSD.

Approved by: trhodes (mentor), keramida (mentor)

Sort sections.

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

A refused connection will return ECONNREFUSED rather than ECONNRESET.

PR: docs/46654
Submitted by: Christian S.J. Peron <maneo@bsdpro.com>

sysctl -w -> sysctl, remove second person pronouns, and fix some other
minor bugs.

PR: 30772
Submitted by: Peter Avalos <pavalos@theshell.com>

mdoc(7) police: removed final dot from the .Nd call.

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.

mdoc(7) police: remove extraneous .Pp before and/or after .Sh.

Some minor mdoc style cleanup.

$Id$ -> $FreeBSD$

Update blackhole(4)

Add man page for black hole sysctl MIBs.
references to follow.