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/

Move mail.rc install to usr.bin/mail.

This leverages CONFS to do the install

Approved by: re (blanket, pkgbase), bapt (mentor)
Differential Revision: https://reviews.freebsd.org/D17216

Add const to the copyright variable
Bump WARNS to level 2

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.

Rename mail(1)'s aux.c to util.c.

The name `aux' is reserved on Windows file systems. aux.c in the mail(1)
directory contains some random utility functions. I'm renaming this file
to util.c to make it possible to check out this directory on Windows.

MFC after: 1 month

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

Drop support for COPY, -c has been the default mode of install(1)
for a long time now.

Approved by: bde

s/${INSTALL} -c/${INSTALL} ${COPY}/

Remove NO_WERRORs and WARNS=n's. To be revisited after GCC3.

Link mail(1) to mailx per POSIX. Mail(1) isn't 100% POSIX compliant,
but it is pretty close.

Not objected to by: -standards

Install files via FILES.

I'm working on cleaning this up, however it probably won't be done for
awhile. Turn off WARNS so that this doesn't break the build when WARNS
is turned on higher up. Also add $FreeBSD$.

make install should not install mail.rc in /etc

Simplistic conversion of mail to use termios instead of sgtty.

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

Remove -R from CFLAGS

BSD 4.4 Lite Usr.bin Sources