-.It Va BindToInterface Li = Ar interface Bq experimental
-If your computer has more than one network interface,
+.It Va AddressFamily Li = ipv4 | ipv6 | any Po ipv4 Pc Bq experimental
+This option affects the address family of listening and outgoing sockets.
+If
+.Qq any
+is selected, then depending on the operating system both IPv4 and IPv6 or just
+IPv6 listening sockets will be created.
+.It Va BindToAddress Li = Ar address Bq experimental
+If your computer has more than one IPv4 or IPv6 address,