Michał Kępień
367a576f73
When libidn2 2.3.0+ is used, the "idna" system test fails as dig does not fail as expected any more due to libidn2 2.3.0 using Unicode 11.0.0 IDNA mapping tables [1] instead of Unicode 6.3.0 ones which were used until libidn2 2.2.0. Specifically, the SOCKS character (🧦) used in the invalid input U-label check in the "idna" system test is a valid IDNA character as per the IDNA mapping tables for Unicode 11.0.0. Fix the relevant checks by using a different character (🟥) which is an invalid IDNA character for all versions of Unicode released to date. [1] https://gitlab.com/libidn/libidn2/commit/5eaafda64e733bfe15f66c8a39fd9bc2753ba8f2