It seems to me what libidn2 should be used instead. As per https://www.gnu.org/software/libidn/… https://www.gnu.org/software/libidn/… > Please be aware that

It seems to me what libidn2 should be used instead. As per https://www.gnu.org/software/libidn/… https://www.gnu.org/software/libidn/… > Please be aware that GNU libidn2 is the successor of GNU libidn. It comes with IDNA 2008 and TR46 implementation and also provides a compatibility layer for GNU libidn.