00-ip-ask.sh now runs the unchanged check-ipv6-support.sh. Whole prefix verified -> classic prefix mode. Not verified but >1 global address on the NIC -> list them, keep the first for the host, ask the user to confirm the rest as the pool. Declined or no addresses -> pure IPv4. ndppd is only installed in prefix mode; pool mode uses kernel proxy_ndp. vps ip6 gains neigh-add-proxy for the per-address wiring. Co-authored-by: CommandCodeBot <noreply@commandcode.ai>