Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Update to FICL 3.03 (the last release before FICL4 rewrite).

The relevant changes for FreeBSD (excerpt from the release note):

* Newly implemented CORE EXT words: CASE, OF, ENDOF, and ENDCASE. Also
added FALLTHROUGH, which works like ENDOF but jumps to the instruction
just after the next OF.
* Bugfix: John-Hopkins locals syntax now accepts | and -- in the comment
(between the first -- and the }.)
* Bugfix: Changed vmGetWord0() to make Purify happier. The resulting
code is no slower, no larger, and slightly more robust.

Upgrade to FICL version 3.02. Anything wrong is my fault, everything right is
due Jon Mini.

PR: 36308
Submitted by: Jon Mini <mini@haikugeek.com>
MFC after: 4 weeks

Revert rev 1.7 which moved us away from POSIX character classes.
The community feels our base AWK must handle them.

Substitute "[:space:]" with the character constants it expands to.
This was a silent 'failure' when using Bell-Labs awk.

Submitted by: David Wolfskill <david@catwhisker.org>

Bring in ficl 2.05.

This version has a step debugger, which now completely replaces the
old trace feature. Also, we moved all of the FreeBSD-specific MI
code to loader.c, reducing the diff between this and the official
FICL distribution.

Don't use the Gawkism strftime(). Pass in the date stamp on the awk
command line instead.

Approved by: dcs

Make abort" functional in interpret mode. This behavior is undefined
by ANS Forth standard, but it's useful.

Also, define the constant true in a more strict way. C might garantee
2-complement math, but Forth doesn't.

Remove a bug that caused local variables declarations in the format
{ | internal -- } to be rejected.

Add something that was missing from the original 2.04 distribution.

Add "int" sized manipulation words.

Strip spaces and comments more agressively.

Bring in FICL 2.04. No bump of loader version is required by this
commit.

ANS Forth for logical not is 0=, not invert. Replace wrong usage.

Fix world-breaking bug, add $FreeBSD$ tag.

This happened to be my first "for real" broken world. I had broken
it once before, but nobody noticed, so it didn't count.

So, how do I get the "I broke world and all I got was the lousy t-shirt"
t-shirt?

Bring in ficl version 2.03. No version bump for loader.

$Id$ -> $FreeBSD$

Remove redundant code.

Make $ print different lines in, well, different lines.

Make FICL_TRACE default.

Add freebsd.fr, for FreeBSD specific forth source. Add $ and %, to
replace the lost @ and - functionality of include. $ has the opposite
behavior of @ though, since the default behavior was inverted.

Add conditional compilation facilities to ficl. This had been previously
committed to RELENG_3 instead of HEAD, so let's HEAD catch up.

PR: bin/9662

Add EXCEPTION word set.

Make TIB handling use buffer size to conform with ANS Forth.

Add ANS MEMORY-ALLOC word set.

See the PRs for extensive details.

PR: kern/9412 kern/9442 kern/9514
Submitted by: PRs from Daniel Sobral <dcs@newsguy.com>

Transition from using Perl to using awk for our text-manipulation
needs. This removes the dependancy on Perl for the generation of the
loader, allowing the world to be built on a perl-free system.

Submitted by: Joe Abley <jabley@clear.co.nz>

Take init out of here - it's a layering violation.

Make fexists/fload work with existing string literals instead. Doing
my own string literal handling is just too wonky.

Remember a bit more of my forth and do:

o Add fexists word to check for the presence of a file
o make fexists and fload immediate words which DTRT both interpreted
and compiled (doh!)
o add an init word which gets run at bootstrapping time to do extra
post-coldload initialization (in the default implementation, we
look for /boot/boot.4th and load it if found).

Improve the assertion testing for successful softword compilation.
The excessive use of assert() vs. robust error checking is annoying.

Add the Ficl (Forth Inspired Command Language) interpreter. If all goes well,
this will allow us to manage bloat in the loader by using a bytecoded HLL
rather than lots of C code. It also offers an opportunity for vendors
or others with special applications to significantly customise the boot
process without having to commit to a divergent code branch.

This early commit is to allow others to experiment with the most effective
mechanisms for integrating FICL with the loader as it currently stands.

Ficl is distributed with the following license conditions:

"Ficl is freeware. Use it in any way that you like, with the understanding
that the code is not supported."

All source files contain authorship attributions.

Obtained from: John Sadler (john_sadler@alum.mit.edu)