Applications should pick /etc/resolv.conf changes automatically, without calling res_init explicitly. This is important for mobile systems which may migrate between different networks.
glibc-2.25-12.fc26 has been submitted as an update to Fedora 26. https://bodhi.fedoraproject.org/updates/FEDORA-2017-2c63df4fe3
glibc-2.25-12.fc26 has been pushed to the Fedora 26 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-2017-2c63df4fe3
glibc-2.25-12.fc26 has been pushed to the Fedora 26 stable repository. If problems still persist, please make note of it in this bug report.