pcre2: Update to version 10.43

pcre2: Update to version 10.43

- Update from version 10.42 to 10.43
- Update of rootfile
- Changelog
    10.43
	There are quite a lot of changes in this release (see ChangeLog and git log for
	a list). Those that are not bugfixes or code tidies are:
	* The JIT code no longer supports ARMv5 architecture.
	* A new function pcre2_get_match_data_heapframes_size() for finer heap control.
	* New option flags to restrict the interaction between ASCII and non-ASCII
	  characters for caseless matching and \d and friends. There are also new
	  pattern constructs to control these flags from within a pattern.
	* Upgrade to Unicode 15.0.0.
	* Treat a NULL pattern with zero length as an empty string.
	* Added support for limited-length variable-length lookbehind assertions, with
	  a default maximum length of 255 characters (same as Perl) but with a function
	  to adjust the limit.
	* Support for LoongArch in JIT.
	* Perl changed the meaning of (for example) {,3} which did not used to be
	  recognized as a quantifier. Now it means {0,3} and PCRE2 has also changed.
	  Note that {,} is still not a quantifier.
	* Following Perl, allow spaces and tabs after { and before } in all Perl-
	  compatible items that use braces, and also around commas in quantifiers. The
	  one exception in PCRE2 is \u{...}, which is from ECMAScript, not Perl, and
	  PCRE2 follows ECMAScript usage.
	* Changed the meaning of \w and its synonyms and derivatives (\b and \B) in UCP
	  mode to follow Perl. It now matches characters whose general categories are L
	  or N or whose particular categories are Mn (non-spacing mark) or Pc
	  (combining punctuation).
	* Changed the default meaning of [:xdigit:] in UCP mode to follow Perl. It now
	  matches the "fullwidth" versions of hex digits. PCRE2_EXTRA_ASCII_DIGIT can
	  be used to keep it ASCII only.
	* Make PCRE2_UCP the default in UTF mode in pcre2grep and add -no_ucp,
	  --case-restrict and --posix-digit.
	* Add --group-separator and --no-group-separator to pcre2grep.

Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
Reviewed-by: Michael Tremer <michael.tremer@ipfire.org>
Signed-off-by: Arne Fitzenreiter <arne_f@ipfire.org>