lua: Update to 5.4.4

Merge commit '755d9301ca89f02956fd17858b9d4d821ab5c972' from the
vendor branch. This updates us from lua 5.4.2 to 5.4.4.

In addition, it switches around how we flavor liblua fo

lua: Update to 5.4.4

Merge commit '755d9301ca89f02956fd17858b9d4d821ab5c972' from the
vendor branch. This updates us from lua 5.4.2 to 5.4.4.

In addition, it switches around how we flavor liblua for the boot loader
and flua. This is done to reduce diffs with upstream and make it easier
to import new versions (the current method has too many conflicts to
resolve by hand): we include luaconf.local.h from luaconf.h (the only
change to this file is now that #include at the end). We then define
what we need to: for flua (which does very little) and one for stand
(which creates the new FLOAT type out of int64).

Sponsored by: Netflix

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contrib/lua: update to 5.4.2

Merge commit '0ea45b9cd43ce1247eb3eee9bfd5cee3d19068e7' into main

MFH

Sponsored by: Rubicon Communications, LLC (netgate.com)

Fix -Wundef warnings when building liblua

We need to define the LUA_FLOAT_INT64 macro even if we don't use it (copied
from stand/luaconf.h). While touching luaconf.h.dist also sync it with the
the 5

Fix -Wundef warnings when building liblua

We need to define the LUA_FLOAT_INT64 macro even if we don't use it (copied
from stand/luaconf.h). While touching luaconf.h.dist also sync it with the
the 5.3.5 release version (matches the one in lib/liblua).

Reviewed By: kevans
Differential Revision: https://reviews.freebsd.org/D25977

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Preserve the original luaconf.h in a convenient place. Clients will
almost certainly need to override this, so reinforce that. If that's
not hte case, clients can always do a #include luaconf.h.dist.