Remove $FreeBSD$: two-line nroff pattern

Remove /^\.\\"\n\.\\"\s*\$FreeBSD\$$\n/

truncate(1): Fix missing -d option manpage

Mention that either one of the -r, -s and -d options must be specified.

Sponsored by: The FreeBSD Foundation

truncate(1): Add hole-punching support

This commit adds hole-punching support to the truncate(1) utility. If
the option -d is specified, truncate(1) performs zeroing, and if
possible hole-punching in case the operation is supported by the
underlying file system of the specified files.

Sponsored by: The FreeBSD Foundation
Reviewed by: kib
Differential Revision: https://reviews.freebsd.org/D31556

truncate(1): Add EXAMPLES section

Add four simple examples showing the use of -c, -r and -s

Approved by: manpages (bcr@)
Differential Revision: https://reviews.freebsd.org/D25774

truncate: Add support for -s % and /

% round up to the multiple size and / round down
This is compatible with gnu truncate.
Add tests and document in the man page.

use .Mt to mark up email addresses consistently (part3)

PR: 191174
Submitted by: Franco Fichtner <franco at lastsummer.de>

A new jail(8) with a configuration file, to replace the work currently done
by /etc/rc.d/jail.

Create the altix project branch. The altix project will add support
for the SGI Altix 350 to FreeBSD/ia64. The hardware used for porting
is a two-module system, consisting of a base compute module and a
CPU expansion module. SGI's NUMAFlex architecture can be an excellent
platform to test CPU affinity and NUMA-aware features in FreeBSD.

- Import the HEAD csup code which is the basis for the cvsmode work.

The -r option can also cause the files to be extended (not
necessarily truncated).

Markup fixes.

Allow to specify size in terabytes by using T or t suffix.
This speeds up my testing a bit. Because truncate(1) doesn't allocate
blocks on file system before they are used, it is very useful to
emulate huge file systems:

# truncate -s 16T fs.img
# mdconfig -a -f fs.img
# newfs /dev/mdX

(-t swap can be used as well)

Added the EXIT STATUS section where appropriate.

Make size suffix case insensitive.

PR: bin/27604
Submitted by: David Xu <davidx@viasoft.com.cn>

* Update author's e-mail address.

* When the author of an utility also wrote its manual page (a rarety, I
know), it is not necessary to say that the utility "and this manual
page" were written by the author.

Use the .Cm macro to mark up the modifiers of the -s flag's size argument.

mdoc(7) police: utilize the new .Ex macro.

Remove whitespace at EOL.

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

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

Merge the truncate(1) utility onto the RELENG_4 branch and adjust
the HISTORY section to reflect the first release of FreeBSD in
which this utility will appear.

truncate.c:
Do not include unused header files.
Add rcsid.
Change copyright.

truncate.1:
Add AUTHORS section.

Submitted by: charnier

Add a STANDARDS section to discourage the use of this utility
in environments where portability is a concern.

Import the new truncate(1) utility.

Approved by: jdp