Possibility to use custom defined hostname in Consul telemetry

Hi there,

Is it possible to use telemetry in v. 0.6.4 with custom defined IP address?
I need statsite metrics with IP address separated by dashes like 172-31-31-31 instead of default 172.31.31.31

My namespace is:

```
curl -s http://localhost:8500/v1/catalog/nodes | jq .[]
...
{
"Node": "consul-172.31.31.31",
"Address": "172.31.31.31",
"TaggedAddresses": {
"wan": "172.31.31.31"
}
}
...
```

Is there is any way to re-define it as we do with a statsite_prefix option?