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
All IPv6 packets for the self address were doing netip.Prefix.Contains lookups. If if we know they're for a self address (which we already previously computed and have sitting in a bool), then they can't be for a 4via6 range. Change-Id: Iaaaf1248cb3fecec229935a80548ead0eb4cb892 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>