Add status message for "listening" to expressly print out port

### Old:

```
[*] Trying to bind to 0.0.0.0 on port 0...
[*] Trying to bind to 0.0.0.0 on port 0: Trying 0.0.0.0
[+] Trying to bind to 0.0.0.0 on port 0: OK
[*] Waiting
```

### New

```
[*] Trying to bind to 0.0.0.0 on port 0...
[*] Trying to bind to 0.0.0.0 on port 0: Trying 0.0.0.0
[+] Trying to bind to 0.0.0.0 on port 0: OK
[*] Waiting for connections on 0.0.0.0:35224...
```