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

.gitattributes

@@ -5,3 +5,4 @@
 *.py   diff=python
 . svn-properties=svn:keywords=tools/build/options/WITHOUT_LOADER_ZFS
 .clang-format svn-properties=svn:keywords=FreeBSD=%H
+contrib/one-true-awk/bugs-fixed/unicode-null-match.bad binary

UPDATING

@@ -27,6 +27,11 @@ NOTE TO PEOPLE WHO THINK THAT FreeBSD 15.x IS SLOW:
 	world, or to merely disable the most expensive debugging functionality
 	at runtime, run "ln -s 'abort:false,junk:false' /etc/malloc.conf".)
 
+20231114:
+	One True Awk updated to the Second Edition as of 20231102 (254b979f32df)
+	Notable features include UTF-8 support and --csv to support comma
+	separated data.
+
 20231113:
 	The WITHOUT_LLD_IS_LD option has been removed.  When LLD is enabled
 	it is always installed as /usr/bin/ld.