This was correct already. Revert "Allow uppercase letters in is_unqualified_hostname as well."
This reverts commit 94ccdcb8a4d6f7789fd39c4b6e9876bb689de9a4.
This was correct already. Revert "Allow uppercase letters in is_unqualified_hostname as well."
This reverts commit 94ccdcb8a4d6f7789fd39c4b6e9876bb689de9a4.