More info when UPnP fails

I couldn't connect to other stores and I discovered that my UPnP failed saying:

```
UPnP TCP P2P Port Map configuration done (12345 -> 12345) => False
UPnP UDP P2P Port Map configuration done (12345 -> 12345) => False
```

After talking to @SamPatt in irc he mentioned that I could try port forward `12345` and use `./run.sh -j` to avoid UPnP. I just created this pr to add additional information when UPnP fails.