libidn: Update to version 1.42

libidn: Update to version 1.42

- Update from version 1.41 to 1.42
- Update of rootfile
- Changelog
    1.42
	** Bump required gettext version to 0.19.8 for musl-libc.
	** Compiler warning improvements.
		As before, compiler warnings are enabled by default.  You may disable
		them using ./configure --disable-gcc-warnings or turn them into fatal
		errors using ./configure --enable-gcc-warnings=error to add -Werror
		and sensible -Wno-error='s.  Based on gnulib's manywarnings, see
		<https://www.gnu.org/software/gnulib//manual/html_node/manywarnings.html>.
	** Fix type confusion on LLP64/Windows platforms.
		While libidn has worked using cygwin libc, it has never worked on
		ucrt/msvcrt libc.  Report and tiny patch by Francesco Pretto in
		<https://lists.gnu.org/archive/html/help-libidn/2022-02/msg00000.html>.
	** tests: Added script tests/standalone.sh suitable for integrators.
		The main purpose is to test a system-installed libidn, suitable for
		distributor checking (a'la Debian's autopkgtest/debci).  It may also
		be used to test a newly built libidn outside the usual 'make check'
		infrastructure.  To check that your system libidn is working, invoke
		the script with `srcdir` as an environment variable indicating where
		it can be find the source code for libidn's tests/ directory (it will
		use the directory name where the script is by default):
			tests/standalone.sh
			 To check that a newly built static libidn behaves, invoke:
				env STANDALONE_CFLAGS="-Ilib lib/.libs/libidn.a"
				 tests/standalone.sh
			 To check that a newly built shared libidn behaves, invoke:
				env srcdir=tests STANDALONE_CFLAGS="-Ilib -Wl,-rpath
				 lib/.libs lib/.libs/libidn.so" tests/standalone.sh
			 If the libidn under testing is too old and has known bugs, that
			  should cause tests to fail, which is intentional.
	** Updated translations.
	** Update gnulib files and build fixes.

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