loader: For the mini-stdio we have for lua, #define them to something else

To make it easier to port lua and some of the lua modules, we have a
series of routines to implement the stdio routines, ev

loader: For the mini-stdio we have for lua, #define them to something else

To make it easier to port lua and some of the lua modules, we have a
series of routines to implement the stdio routines, even though we don't
normally implement them in the boot loader. Add a comment to this effect.

Also, some tools, like sanitizers and static analysis tools, make
unwarranted assumptions about these, so #define them to a different name
so they stop.

Sponsored by: Netflix

(cherry picked from commit 9a5aaa97cbae024f90bb626f78c3dbde28653c58)

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Remove $FreeBSD$: two-line .h pattern

Remove /^\s*\*\n \*\s+\$FreeBSD\$$\n/

liblua: Implement write support

Write support (even if it only works on UFS) will be needed for nextboot
functionality.

Reviewed by: cem, imp
Differential Revision: https://reviews.freebsd.org/D144

liblua: Implement write support

Write support (even if it only works on UFS) will be needed for nextboot
functionality.

Reviewed by: cem, imp
Differential Revision: https://reviews.freebsd.org/D14478

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liblua: Emulate DIR, opendir, fdopendir, closedir

In a similar fashion to FILE, provide thin shims for the standard directory
manipulation functions.

Reviewed by: imp
Sponsored by: Dell EMC Isilon

liblua: Emulate DIR, opendir, fdopendir, closedir

In a similar fashion to FILE, provide thin shims for the standard directory
manipulation functions.

Reviewed by: imp
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D14417

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Add Lua as a scripting langauge to /boot/loader

liblua glues the lua run time into the boot loader. It implements all
the runtime routines that lua expects. In addition, it has a few
standard 'C' he

Add Lua as a scripting langauge to /boot/loader

liblua glues the lua run time into the boot loader. It implements all
the runtime routines that lua expects. In addition, it has a few
standard 'C' headers that nueter various aspects of the LUA build that
are too specific to lua to be in libsa. Many refinements from the
original code to improve implementation and the number of included lua
libraries. Use int64_t for lua_Number. Have "/boot/lua" be the default
module path. Numerous cleanups from the original GSoC project,
including hacking libsa to allow lua to be built with only one change
outside luaconf.h.

Add the final bit of lua glue to bring in liblua and plug into the
multiple interpreter framework, previously committed.

Add LOADER_LUA option, currently off by default.

Presently, this is an experimental option. One must opt-in to using
this by defining WITH_LOADER_LUA and WITHOUT_FORTH. It's been
lightly tested, so keep a backup copy of your old loader handy.
The menu code, coming in the next commit, hasn't been exhaustively
tested. A LUA boot loader is 60k larger than a FORTH one, which is
80k larger than a no-interpreter one. Subtle changes in size
may tip things past some subtle limit (the binary is ~430k now
when built with LUA). A future version may offer coexistance.

Bump FreeBSD version to 1200058 to mark the milestone.

Pedro Souza's 2014 Summer of Code project. Rui Paulo, Pedro Arthur,
Zakary Nafziger and Wojciech A. Koszek also contributed. Warner Losh
reworked it extensively into its current form.

Obtained from: https://wiki.freebsd.org/SummerOfCode2014/LuaLoader
Sponsored by: Google Summer of Code
Relnotes: Yes
MFC After: 1 month
Differential Review: https://reviews.freebsd.org/D14295

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