Purge more stray embedded $FreeBSD$ strings

These do not use __FBSDID but instead use bare char arrays.

Reviewed by: imp, emaste
Differential Revision: https://reviews.freebsd.org/D41957

Mark usage function as __dead2 in programs where it does not return

In most cases, usage does not return, so mark them as __dead2. For the
cases where they do return, they have not been marked __dead2.

Reviewed by: imp
Pull Request: https://github.com/freebsd/freebsd-src/pull/735

spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD

The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch
up to that fact and revert to their recommended match of BSD-2-Clause.

Discussed with: pfg
MFC After: 3 days
Sponsored by: Netflix

various: general adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

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.

No functional change intended.

Use INADDR_NONE instead of -1 to check inet_addr() result.

Reviewed by: glebius

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

nos-tun(8): make WARNS=3 clean

The renames are in spirit of DragonflyBSD, to keep diff minimal.

PR: bin/140060
Approved by: ed (co-mentor)

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.

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

64 bit fixes. in_addr_t is an uint32_t, not a u_long.

Don't depend on <sys/types.h> pollution in <fcntl.h>. Sort includes.

o remove __P
o remove main prototype

from select(2):
Any of readfds, writefds, and exceptfds may be given as nil
pointers if no descriptors are of interest.

neither wfds nor efds were of interest so now they are nil.

also, do a little better then making an educated guess for nfds.

s/adress/address/

Inspired by: OpenBSD
MFC After: 1 week

Allow specification of which source address to use for encapsulation.

PR: 25847
Submitted by: Eugene Polovnikov <eugene@brain-fag.org>

Fix occurences of nos_tun to nos-tun, this improves internal
consistency as well as an usage printout.

PR: 10538
Submitted by: piazza
Nudged by: nrahlstr

$Id$ -> $FreeBSD$

Add ability to set protocol number.

PR: 10753
Submitted by: Isao SEKI <iseki@gongon.com>

Fixed printf format errors.

Do not uppercase first letter in syslog() string.

Add usage() and rcsid. Getopt() returns -1 not EOF. Remove unused #includes.
Use .An/.Aq in man page.

Program which implements "nos" alias "ka9q" alias "IP-IP" tunnels.

PR: 1154
Reviewed by: phk
Manpage by: phk
Submitted by: Nickolay N. Dudorov nnd@itfs.nsk.su