
This adds a new integration test with two nodes where the first gets a incremental MapResponse (with only PeersRemoved set) saying that the second node disappeared. This extends the testcontrol package to support sending raw MapResponses to nodes. Updates #1909 Change-Id: Iea0c25c19cf0d72b52dba5a46d01b5cc87b9b39d Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>