usr.bin: Remove ancient SCCS tags.

Remove ancient SCCS tags from the tree, automated scripting, with two
minor fixup to keep things compiling. All the common forms in the tree
were removed with a perl script.

Sponsored by: Netflix

Remove $FreeBSD$: two-line .c pattern

Remove /^#include\s+<sys/cdefs.h>.*$\n\s+__FBSDID\("\$FreeBSD\$"\);\n/

General further adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 3-Clause license.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

Special thanks to Wind River for providing access to "The Duke of
Highlander" tool: an older (2014) run over FreeBSD tree was useful as a
starting point.

Renumber copyright clause 4

Renumber cluase 4 to 3, per what everybody else did when BSD granted
them permission to remove clause 3. My insistance on keeping the same
numbering for legal reasons is too pedantic, so give up on that point.

Submitted by: Jan Schaumann <jschauma@stevens.edu>
Pull Request: https://github.com/freebsd/freebsd/pull/96

Add missing static keywords to talk(1)

Remove the advertising clause from UCB copyrighted files in usr.bin. This
is in accordance with the information provided at
ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change

Also add $FreeBSD$ to a few files to keep svn happy.

Discussed with: imp, rwatson

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.

ANSIfy function prototypes. While I am there, constify some parameters and
make use of C99 sparse initialization for static variables, this makes talk(1)
to compile cleanly with WARNS=6.

Handle window resizing better.

Submitted by: Cyril Nguyen Huu
Obtained from: OpenBSD

WARNS=2 fixes with NO_WERROR set because of system-header originating
warnings. Use __FBSDID().

Include missing header files which define functions for which gcc has
builtints (e.g., exit, strcmp).

talk depended on side effects of curses includes.

$Id$ -> $FreeBSD$

Add rcsid. Remove unused #includes (what about RU# ?). Change exit(-1) and
add usage().

Enable idlok() in both windows. This is actually a no-op for libcurses
(which doesn't use the setting at all), but when linking with
recent versions of libncurses, ncurses screws up without it for some reason
(presumably a ncurses bug).

If running under a typical sysv-style curses, including ncurses, use
hline() to draw the window split rather than fudging it with dashes.
This causes the line to be drawn in line-draw characters if the terminal
description has them.

Suggested by: ache

Update some ancient warts in talk:
- use termios, not sgtty
- dont use _putchar(), that was a BSD-curses specific feature not in
other curses packages (such as ncurses)
- use sigaction, not sigvec while I'm there
- box() does different things under sysv/ncurses on 1-line high windows,
and BSD-curses doesn't have hline(), so do it by adding characters
instead. That works on both styles of curses.

Make talk automagically find out the interface IP address where the
remote peer will be connected through. This avoids the ``Checking for
invitation on caller's machine'' problem for multi-homed hosts.

Thanks to: Garrett, for his `find_interface' example

Remove trailing whitespace.

Add check for writeable terminal
Submitted by: mark@grondar.za (and slightly modified)

Make talk ctype-aware, handle controns as tcsh does, use human-oriented
scroll, most of changes from 1.x

BSD 4.4 Lite Usr.bin Sources