-address (in "dotted-quad" notation) on which we should
-listen to \fBnbd-client\fR(8) connections. If
-it is not set, 0.0.0.0 is used (i.e., "listen on all local
-IP addresses")
+address on which we should listen to
+\fBnbd-client\fR(8) connections. If it is not
+set, \fBnbd-server\fR will listen to all
+local IPv4 and IPv6 addresses. To limit to IPv6, specify the
+address as "::". To limit to IPv4, specify as "0.0.0.0". It
+is not possible to specify more than one IP address
+here.