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)

.Pp before .Sh is redundant.

Reviewed by: ru

Expand contractions.

Mechanically kill hard sentence breaks and double whitespaces.

Assorted markup, spelling, and grammar fixes.

mdoc(7) police:

* correctly place parenthisized sentences
* remove hard sentence breaks
* use .Vt instead of .Fn

Mdoc Janitor:

* Fix hard sentence breaks.

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

Approved by: re

ispell sweep of share/man/man9/*.

buf.9 incorrectly uses 'BUF' as an arg to .Nm where it should be 'buf'.
Because of this apropos notes a BUF(9) page that does not exist.

Reviewed by: alfred

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: remove extraneous .Pp before and/or after .Sh.

mdoc(7) police: normalize .Nd.

Prepare for mdoc(7)NG.

mdoc(7)'fy, fix broken FreeBSD release number (3.0.1 -> 3.1)

$Id$ -> $FreeBSD$

Fix some typos and do some minor mdoc cleanup.

Fix some spelling errors.

Add manual page describing kernel buffer management system (i.e.
kern/vfs_bio.c).