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 $FreeBSD$: one-line sh pattern

Remove /^\s*#[#!]?\s*\$FreeBSD\$.*$\n/

gprof: Retire a.out support

FreeBSD has used ELF binaries/libraries for decades, but still has some
support for legacy a.out binaries. Portions of this have been retired
over time, but support remained in ldd, ldconfig, and gprof.

Retire gprof support; if anyone needs to do development on a.out
binaries still they will be best served by installing a full FreeBSD 2.x
or other obsolete version in a jail.

Kernel support for executing a.out binaries is unchnaged.

Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D27480

Cleanups for gprof:

* Remove identical or almost identical headers
* Only build aout.c on amd64 and i386. None of the the other current
architectures ever supported running a.out binaries
* Enable on all architectures

Sponsored by: Innovate UK
Differential Revision: https://reviews.freebsd.org/D26369

gprof: Enable riscv

Add a missing riscv.h header file, and fix the check for riscv (must test
MACHINE_CPUARCH, not MACHINE_ARCH, if we want to use 'riscv').

Sponsored by: Axiado

gprof: disable building of a.out components

On arm64, riscv, and s390x disable building of aout components.
This allows gprof to build on these architectures which never supported
the legacy a.out binary format.

Obtained from: s390x branch
MFC after: 3 months

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.

Build usr.bin/ with WARNS=6 by default.

Also add some missing $FreeBSD$ to keep svn happy.

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

Retire support for gprof's -c option. All our currently supported
architectures only provide a dummy implementation.

Silence on: current@

Oops, forgot to remove the `beforeinstall' block.

Install files via FILES.

Add -K support to gprof(1), which enables dynamic symbol resolution from
the currently-running kernel (and supercedes an executable file argument
given). With this change, properly-compiled KLD modules are now
able to be profiled.

Obtained from: NAI Labs CBOSS project
Funded by: DARPA

Make profiling work for ELF. gprof now autodetects the format of
the executable file, so it will work for both a.out and ELF format
files. I have split the object format specific code into separate
source files. It's cleaner than it was before, but it's still
pretty crufty.

Don't cheat on your make world for this update. A lot of things
have to be rebuilt for it to work, including the compiler and all
of the profiled libraries.

Change MACHINE to MACHINE_ARCH to support MACHINE=pc98.

Change `install' to `${INSTALL}' so that default install flags can be
specified in the top level Makefiles.

BSD 4.4 Lite Usr.bin Sources