Merge one true awk from 2024-01-22 for the Awk Second Edition support

This brings in Unicode support, CSV support and a number of bug fixes.
They are described in _The AWK Programming Language_, Second Edition, by
Al Aho, Brian Kernighan, and Peter Weinberger (Addison-Wesley, 2024,
ISBN-13 978-0138269722, ISBN-10 0138269726).

Sponsored by: Netflix

Revert "awk: Merge upstream 2nd Edition Awk Book"

The pre-push testing I did turned out to be testing the old version with
the old testsuite (for reasons I don't understnad). There's issues with
the new version, the new test in the suite or (likely) both. Revert
until they can be chased down.

This should also fix the github CI that's gone red since this commit.

This reverts commit 3fd60a6b73ac01a72df89751f173970fae4cae73, reversing
changes made to 194df014feebd8b169b41ecd75ae73d63a792d6b.

Sponsored by: Netflix

awk: Merge upstream 2nd Edition Awk Book

Merge in the November 2nd, 2023 version of one true awk.

This brings in Unicode support, CSV support and a number of bug fixes.

Sponsored by: Netflix
Reviewed by: delphij
Differential Revision: https://reviews.freebsd.org/D42447

awk: Merge 20210729 from One True Awk upstream (0592de4a)

July 27, 2021:
As per IEEE Std 1003.1-2008, -F "str" is now consistent with
-v FS="str" when str is null. Thanks to Warner Losh.

July 24, 2021:
Fix readrec's definition of a record. This fixes an issue
with NetBSD's RS regular expression support that can cause
an infinite read loop. Thanks to Miguel Pineiro Jr.

Fix regular expression RS ^-anchoring. RS ^-anchoring needs to
know if it is reading the first record of a file. This change
restores a missing line that was overlooked when porting NetBSD's
RS regex functionality. Thanks to Miguel Pineiro Jr.

Fix size computation in replace_repeat() for special case
REPEAT_WITH_Q. Thanks to Todd C. Miller.

Also, included the tests from upstream, though they aren't yet connected
to the tree.

Sponsored by: Netflix

awk: Reduce diffs with upstream to almost nothing.

In the merge of 20210215, I left two merge conflicts #if 0'd by mistake
to check later rather than resolve them as part of the merge. This code
turns out to be from the original one-true-awk import and not FreeBSD
specific, so remove them.

Remove a extra definition of HAT.

Remove a stylistic change that also appears to be a mismerge along the
way.

Remove FREEBSD-upgrade. Nobody has updated it since the original 2007
cvs import. It talks about old CVS branches that never made it into svn,
let alone git. New imports will follow the standard practices now, so
there's nothing left to document.

Move README to README.md and copy the README.md from upstream over.

This leaves just the $FreeBSD$ lines (which remain for the stable/12
merge) and the strcoll part of ru@'s r201989/d98dd8e5f94c as the only
diffs with upstream. FreeBSD also still has its own man page, which I
don't plan on changing. Once this commit is merged to stable/12, I plan
no further merges to stable/12. Sometime after that I'll remove the
$FreeBSD$ lines to reduce the diffs even more (though i want to make
sure plans won't change first). I also plan to talk to upstream about
this change...

MFC After: 2 weeks
Sponsored by: Netflix

Revert "awk: Merge upstream 2nd Edition Awk Book"

The pre-push testing I did turned out to be testing the old version with
the old testsuite (for reasons I don't understnad). There's issues with
the new version, the new test in the suite or (likely) both. Revert
until they can be chased down.

This should also fix the github CI that's gone red since this commit.

This reverts commit 3fd60a6b73ac01a72df89751f173970fae4cae73, reversing
changes made to 194df014feebd8b169b41ecd75ae73d63a792d6b.

Sponsored by: Netflix

awk: Merge upstream 2nd Edition Awk Book

Merge in the November 2nd, 2023 version of one true awk.

This brings in Unicode support, CSV support and a number of bug fixes.

Sponsored by: Netflix
Reviewed by: delphij
Differential Revision: https://reviews.freebsd.org/D42447

awk: Merge 20210729 from One True Awk upstream (0592de4a)

July 27, 2021:
As per IEEE Std 1003.1-2008, -F "str" is now consistent with
-v FS="str" when str is null. Thanks to Warner Losh.

July 24, 2021:
Fix readrec's definition of a record. This fixes an issue
with NetBSD's RS regular expression support that can cause
an infinite read loop. Thanks to Miguel Pineiro Jr.

Fix regular expression RS ^-anchoring. RS ^-anchoring needs to
know if it is reading the first record of a file. This change
restores a missing line that was overlooked when porting NetBSD's
RS regex functionality. Thanks to Miguel Pineiro Jr.

Fix size computation in replace_repeat() for special case
REPEAT_WITH_Q. Thanks to Todd C. Miller.

Also, included the tests from upstream, though they aren't yet connected
to the tree.

Sponsored by: Netflix

awk: Reduce diffs with upstream to almost nothing.

In the merge of 20210215, I left two merge conflicts #if 0'd by mistake
to check later rather than resolve them as part of the merge. This code
turns out to be from the original one-true-awk import and not FreeBSD
specific, so remove them.

Remove a extra definition of HAT.

Remove a stylistic change that also appears to be a mismerge along the
way.

Remove FREEBSD-upgrade. Nobody has updated it since the original 2007
cvs import. It talks about old CVS branches that never made it into svn,
let alone git. New imports will follow the standard practices now, so
there's nothing left to document.

Move README to README.md and copy the README.md from upstream over.

This leaves just the $FreeBSD$ lines (which remain for the stable/12
merge) and the strcoll part of ru@'s r201989/d98dd8e5f94c as the only
diffs with upstream. FreeBSD also still has its own man page, which I
don't plan on changing. Once this commit is merged to stable/12, I plan
no further merges to stable/12. Sometime after that I'll remove the
$FreeBSD$ lines to reduce the diffs even more (though i want to make
sure plans won't change first). I also plan to talk to upstream about
this change...

MFC After: 2 weeks
Sponsored by: Netflix

awk: Merge 20210729 from One True Awk upstream (0592de4a)

July 27, 2021:
As per IEEE Std 1003.1-2008, -F "str" is now consistent with
-v FS="str" when str is null. Thanks to Warner Losh.

July 24, 2021:
Fix readrec's definition of a record. This fixes an issue
with NetBSD's RS regular expression support that can cause
an infinite read loop. Thanks to Miguel Pineiro Jr.

Fix regular expression RS ^-anchoring. RS ^-anchoring needs to
know if it is reading the first record of a file. This change
restores a missing line that was overlooked when porting NetBSD's
RS regex functionality. Thanks to Miguel Pineiro Jr.

Fix size computation in replace_repeat() for special case
REPEAT_WITH_Q. Thanks to Todd C. Miller.

Also, included the tests from upstream, though they aren't yet connected
to the tree.

Sponsored by: Netflix

awk: Reduce diffs with upstream to almost nothing.

In the merge of 20210215, I left two merge conflicts #if 0'd by mistake
to check later rather than resolve them as part of the merge. This code
turns out to be from the original one-true-awk import and not FreeBSD
specific, so remove them.

Remove a extra definition of HAT.

Remove a stylistic change that also appears to be a mismerge along the
way.

Remove FREEBSD-upgrade. Nobody has updated it since the original 2007
cvs import. It talks about old CVS branches that never made it into svn,
let alone git. New imports will follow the standard practices now, so
there's nothing left to document.

Move README to README.md and copy the README.md from upstream over.

This leaves just the $FreeBSD$ lines (which remain for the stable/12
merge) and the strcoll part of ru@'s r201989/d98dd8e5f94c as the only
diffs with upstream. FreeBSD also still has its own man page, which I
don't plan on changing. Once this commit is merged to stable/12, I plan
no further merges to stable/12. Sometime after that I'll remove the
$FreeBSD$ lines to reduce the diffs even more (though i want to make
sure plans won't change first). I also plan to talk to upstream about
this change...

MFC After: 2 weeks
Sponsored by: Netflix

awk: Reduce diffs with upstream to almost nothing.

In the merge of 20210215, I left two merge conflicts #if 0'd by mistake
to check later rather than resolve them as part of the merge. This code
turns out to be from the original one-true-awk import and not FreeBSD
specific, so remove them.

Remove a extra definition of HAT.

Remove a stylistic change that also appears to be a mismerge along the
way.

Remove FREEBSD-upgrade. Nobody has updated it since the original 2007
cvs import. It talks about old CVS branches that never made it into svn,
let alone git. New imports will follow the standard practices now, so
there's nothing left to document.

Move README to README.md and copy the README.md from upstream over.

This leaves just the $FreeBSD$ lines (which remain for the stable/12
merge) and the strcoll part of ru@'s r201989/d98dd8e5f94c as the only
diffs with upstream. FreeBSD also still has its own man page, which I
don't plan on changing. Once this commit is merged to stable/12, I plan
no further merges to stable/12. Sometime after that I'll remove the
$FreeBSD$ lines to reduce the diffs even more (though i want to make
sure plans won't change first). I also plan to talk to upstream about
this change...

MFC After: 2 weeks
Sponsored by: Netflix