+5794. [func] Set the IPV6_V6ONLY on all IPv6 sockets to
+ restrict the IPv6 sockets to sending and
+ receiving IPv6 packets only. [GL #3093]
+
5793. [bug] Correctly detect and enable UDP recvmmsg support
in all versions of libuv that support it. [GL #3095]
Removed Features
~~~~~~~~~~~~~~~~
-- None.
+- The IPv6 sockets are now explicitly restricted to sending and receiving IPv6
+ packets only. This renders the ``dig`` option ``+mapped`` non-functioning and
+ thus the option has been removed. :gl:`#3093`
Feature Changes
~~~~~~~~~~~~~~~