Revert "Fix #6864 automatically convert IPv6 input to lowercase"
This reverts commit d461ff40e364fc0ecc003b9f673cbad7c6a08f2f.
Revert "Fix #6864 automatically convert IPv6 input to lowercase"
This reverts commit d461ff40e364fc0ecc003b9f673cbad7c6a08f2f.