[ipv6-wg] IPv6 only as default for next meeting

During WG this afternoon, the idea was submitted that the IPv6 only
experimentation be made the default SSID for the next meeting.

While this has been working tremendously well for routine internet
usage, I've been unable to use this network mainly because of
incompatibility with my VPN network.

We have a dual-stack VPN. some of the resources are v4 only though.
The DNS64 converts my v4 VPN resources into v6 resources that are then
routed to the non-VPN interface. While there could be workarounds
(DNS64 on the VPN side, full v6 routing on the VPN, or all VPN
resources available on v6) I don't think the technology is mature
enough to make it the default for advanced usage.

My 0.02$