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)

Revert most of r210764, now that mdocml does the right
thing with empty quotation macros.

Requested by: Alex Kozlov

mdoc: make sure to pass at least one argument to quotation macros

mdoc: order prologue macros consistently by Dd/Dt/Os

Although groff_mdoc(7) gives another impression, this is the ordering
most widely used and also required by mdocml/mandoc.

Reviewed by: ru
Approved by: philip, ed (mentors)

Reduce diffs with c99(1).

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

Mechanically kill hard sentence breaks.

mdoc(7) police: fix markup.

Turned the shell script into a binary fixing several minor buglets.
Mention _POSIX_SOURCE feature test macro in man page.
PR: bin/19337
Submitted by: myself way back when I was a nobody :-) (schweikh)
Reviewed by: joerg, bde
MFC after: 2 weeks

Prepare for mdoc(7)NG.

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

Typo. Standard list of flag
Add ``c89: '' in front of error messages to be errx()-like.

$Id$ -> $FreeBSD$

Use -ansi -pedantic -trigraphs, as suggested by Bruce.

Enforce that only Posix-spec'ed options are being used, so people could
use this as a Posixificator of some kind.

Document the Posix usage in the man page, so to make it clear what's
the difference between Posix c89, and gcc.

This commit was generated by cvs2svn to compensate for changes in r29544,
which included commits to RCS files with non-trunk default branches.

c89 is the Posix.2 name for a C compiler that accepts ANSI/ISO C source
code. Basically a shortcut to cc -ansi -trigraphs.