bin: Automated cleanup of cdefs and other formatting

Apply the following automated changes to try to eliminate
no-longer-needed sys/cdefs.h includes as well as now-empty
blank lines in a row.

Remove /^#if.*\n#endif.*\n#include\s+<sys/cdefs.h>.*\n/
Remove /\n+#include\s+<sys/cdefs.h>.*\n+#if.*\n#endif.*\n+/
Remove /\n+#if.*\n#endif.*\n+/
Remove /^#if.*\n#endif.*\n/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/types.h>/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/param.h>/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/capsicum.h>/

Sponsored by: Netflix

Remove $FreeBSD$: one-line .c pattern

Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/

Fix typo in pwait.c introduced in 5bdce6ff546e

Reported by: kevans

Remove deadlock in rc caused by pwait waiting for itself.

The following situation can trigger the deadlock:
1) Long time ago a_service was started through rc.d
2) We want to restart a_service and issue service a_service restart
3) rc.subr reads current process PID (via file or process),
sends TERM signal and runs pwait with PID harvested
4) a_service process dies very quickly so it's PID becomes available.
It is possible that while original process was running,
PID counter overflowed and pwait got assigned a_service's PID.

This patch ignores pid(s) to wait that are equal to pwait PID.

Reported by: Dan McGregor, Boris Lytochkin
Submitted by: Boris Lytochkin <lytboris at gmail.com>
Reviewed By: 0mp
MFC after: 2 weeks
PR: 218598
Differential Revision: https://reviews.freebsd.org/D28240

Remove unused include.

MFC after: 2 weeks

Restore previous usage presentation (without "pwait: " prefix).

Pointed out by: jilles

Style changes, mostly usage of braces around single line statements -
it is safer and allowed for some time now by style(9).

Sponsored by: Fudo Security

Implement -o flag which tells pwait(1) to exit if any of the given processes
has terminated.

Sponsored by: Fudo Security

Don't setup a timeout if we are exiting.

Sponsored by: Fudo Security

Check for duplicated PID without using additional variable.

Sponsored by: Fudo Security

- Be consistent with using sysexits(3) codes.
- Turn fprintf()+exit() into errx().

Sponsored by: Fudo Security

pwait: Add a -t flag to specify a timeout before exiting, and tests.

The exit status will be 124, as the timeout(1) utility uses.

Reviewed by: jilles
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D9697

Use a different way to silence clang analyzer as done in r245494 by
explicitly telling the compiler that we are on the exit route.

X-MFC: together with r245494

Free memory before exiting in order to silence a warning from the clang
static analyzer

Approved by: cperciva
MFC after: 3 days

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.

MFC r199458: Add pwait utility, which waits for any process to terminate.

This is similar to the Solaris utility of the same name.

Some use cases:
* rc.subr's wait_for_pids
* interactive use, e.g. to shut down the computer when some task is done
even if the task is already running

Add pwait utility, which waits for any process to terminate.

This is similar to the Solaris utility of the same name.

Some use cases:
* rc.subr's wait_for_pids
* interactive use, e.g. to shut down the computer when some task is done
even if the task is already running

Discussed on: hackers@