Description of problem: libidn2 0.11 has several limitation with regards to IDNA2008 handling. Transitional vs non-transitional, normalization prior to conversion, case folding etc. Please update to version 0.16 which handles most of these issues.
libidn2-0.16-1.fc25 has been submitted as an update to Fedora 25. https://bodhi.fedoraproject.org/updates/FEDORA-2017-f6ee8c9744
libidn2-0.16-1.fc24 has been submitted as an update to Fedora 24. https://bodhi.fedoraproject.org/updates/FEDORA-2017-b8ea539734
libidn2-0.16-1.fc25 has been pushed to the Fedora 25 testing repository. If problems still persist, please make note of it in this bug report. See https://fedoraproject.org/wiki/QA:Updates_Testing for instructions on how to install test updates. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2017-f6ee8c9744
libidn2-0.16-1.fc25 has been pushed to the Fedora 25 stable repository. If problems still persist, please make note of it in this bug report.
libidn2-0.16-1.fc24 has been pushed to the Fedora 24 testing repository. If problems still persist, please make note of it in this bug report. See https://fedoraproject.org/wiki/QA:Updates_Testing for instructions on how to install test updates. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2017-b8ea539734
libidn2-0.16-1.fc24 has been pushed to the Fedora 24 stable repository. If problems still persist, please make note of it in this bug report.