scope probe connects to localhost & prod even when given explicit hostnames

[jml]

Reproduce:

• run ./scope launch --service-token $TOKEN $IP_ADDRESS:$PORT
• observe the output container ID
• run docker logs -f $CONTAINER_ID

Observed:

Logs contain:

 <probe> INFO: 2016/06/08 12:55:40.983088 publishing to: localhost:4040, $IP_ADDRESS:$PORT, scope.weave.works:443

and then following there are "connection refused" errors for connecting to 127.0.0.1.

Expected:

I would have expected the probe to connect only to the IP address I specified, and not to localhost or scope.weave.works.