Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

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

Mechanically kill hard sentence breaks and double whitespaces.

Mdoc Janitor:

* cleanup hard sentence breaks.

* sprinle some .Dq macros.

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

Delete MAKEDEV traces

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

Approved by: re

More file system > filesystem

mdoc(7) police: macroize UNIX.

Ispell sweep of share/man/man4.

Assorted grammar and other mechanical fixes.

PR: 32941
Submitted by: <setantae@submonkey.net>

mdoc(7) police:

Avoid using parenthesis enclosure macros (.Pq and .Po/.Pc) with plain text.
Not only this slows down the mdoc(7) processing significantly, but it also
has an undesired (in this case) effect of disabling hyphenation within the
entire enclosed block.

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

pseudo-device -> device in kernel config lines. Removed whitespace at EOL.
Reviewed by: joerg, dd

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

mdoc(7) police: Er macro usage cleanup.

mdoc(7) police: do not split author names in the AUTHORS section.

Avoid use of direct troff requests in mdoc(7) manual pages.

$Id$ -> $FreeBSD$

Typo - latter -> letter

PR: docs/10591
Submitted by: Kanenda <vanitas@ma3.seikyou.ne.jp>

Refer to "da" rather than "sd" device.

.Sh AUTHOR -> .Sh AUTHORS according to mdoc specs.
Use .An/.Aq.

Sort cross refereces in section SEE ALSO.

Revert $FreeBSD$ back to $Id$

Make the long-awaited change from $Id$ to $FreeBSD$

This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.

Boy, I'm glad we're not using sup anymore. This update would have been
insane otherwise.

Re-add devfs(5) to the xref list, since it now exists,
and remove mount_devfs(8), since that man page is now
really just a pointer to the various section 5 man pages.

Sort cross references.

Minor formatting/style fixes.

Submitted by: Sandro Sigala <sandro@cat.local.net> as part of PR # 2134

Update a bunch of man pages to use the .Fx macro to specify FreeBSD versions.

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.

Add intro(4), as it's being referenced from severall other pages.

Closes PR # docs/947: missing intro(4) manpage
Submitted by: David E. O'Brien (initial version)