misc: 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.

This is for the misfits that have only a few: COPYRIGHT, gnu, tools,
rescue, and etc.

Sponsored by: Netflix

Remove $FreeBSD$: one-line sh pattern

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

bsdbox: remove previously broken telnet(d) support

Support for telnet(d) was commented out some time ago. Remove now that
telnetd is gone.

Reviewed by: imp, delphij, emaste
MFC after: 3 days
Differential Revision: https://reviews.freebsd.org/D36782

bsdbox: fix build after recent libifconfig changes

libifconfig now generates file(s) into its .OBJDIR that are essential to the
build. Make sure we -I that in, like we already do in the ^/rescue build.

bsdbox: remove useless linking against libl

All is good without it; just remove it.

Requested by: bapt

Avoid referencing private lib names directly.

Sponsored by: Dell EMC Isilon

[bsdbox] fix compilation due to library work.

Add -lxo (for df) and -lgpio(for gpioctl) to bsdbox. This will allow the picostation
build to work again.

Reviewed by: adrian

Replace all uses of libncurses and libtermcap with their wide character
variants. This allows usable file system images (i.e. those with both a
shell and an editor) to be created with only one copy of the curses library.

Exp-run: antoine
PR: 189842
Discussed with: bapt
Sponsored by: DARPA, AFRL

NO_MAN= has been deprecated in favor of MAN= for some time, go ahead
and finish the job. ncurses is now the only Makefile in the tree that
uses it since it wasn't a simple mechanical change, and will be
addressed in a future commit.

Remove IPX support.

IPX was a network transport protocol in Novell's NetWare network operating
system from late 80s and then 90s. The NetWare itself switched to TCP/IP
as default transport in 1998. Later, in this century the Novell Open
Enterprise Server became successor of Novell NetWare. The last release
that claimed to still support IPX was OES 2 in 2007. Routing equipment
vendors (e.g. Cisco) discontinued support for IPX in 2011.

Thus, IPX won't be supported in FreeBSD 11.0-RELEASE.

Disable building textproc for now, it doesn't fit on my 4MB flash
partition.

Add -lcrypt as a dynamic target.

Import the first cut of "bsdbox".

This uses the existing crunchgen infrastructure to build
a series of tools designed to replace the base and networking
tools on an embedded system.

It reuses 'bsd.crunchgen.mk' to drive the actual file
creation. The rescue build system also uses this.

Unlike busybox, it doesn't include its own source - instead,
it just builds from the sources in /usr/src/ and leverages
the existing BSD framework.

Thie is still quite messy and could do with a whole lot of
cleaning up. However it is proving to be very useful with
my current build framework, allowing me to build binary root
images that are about 30% less than simply cherrypicking files
and libraries from an installworld.