Allow socket-binding-group-refType to override default-interface

I want all the host controllers in my domain to use the same socket-binding-group. However, each host controller can have multiple servers, each with its own IP, but each IP still reuses the same port number (yet still a unique IP+port combo). The problem is that the socket-binding-group-refType will not let me override the @default-interface value from the referent socket-binding-group. I am forced to create a second, equally verbose, socket-binding-group exactly like the first group in every way, except for the @default-interface. I wish to avoid this. My particular scenario cannot rely on @port-offset because my hardware load-balancer needs all nodes in the same pool to use the same ports.

Under my proposal, the host.xml could thus more easily be written like this:

...
<interfaces>
<interface name="public">
<inet-address value="10.10.10.1" />
</interface>
<interface name="public-two">
<inet-address value="10.10.10.2" />
</interface>
</interfaces>
...
<servers>
<server name="server-one" group="prod-server-group" auto-start="true">
<jvm name="jvm6g" />
</server>
<server name="server-two" group="prod-server-group" auto-start="false">
<jvm name="jvm2g" />
<socket-binding-group ref="standard-sockets" default-interface="public-two" />
</server>
</servers>
...

This alleviates the burden of having to define a second socket-binding-group in domain.xml and maintaining the same set of socket-binding definitions in two places.