This was right to begin with. Revert "Allow uppercase letters in is_unqualified_hostname as well."
This reverts commit 3d5fb131796ba6d9c5d53efe77080d7ddb334f22.
This was right to begin with. Revert "Allow uppercase letters in is_unqualified_hostname as well."
This reverts commit 3d5fb131796ba6d9c5d53efe77080d7ddb334f22.