Explicit IP Address in torrc produces stray (null) in controller event
First, start your Tor with "address 18.244.0.1"
Second, do this on the control port:
```
$ telnet localhost 9051
Trying ::1...
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
authenticate
250 OK
setevents status_server
250 OK
getinfo address
650 STATUS_SERVER NOTICE EXTERNAL_ADDRESS ADDRESS=18.244.0.1 METHOD=CONFIGURED (null)
250-address=18.244.0.1
250 OK
```
That happens because the end of resolve_my_address() calls
```
control_event_server_status(LOG_NOTICE,
"EXTERNAL_ADDRESS ADDRESS=%s METHOD=%s %s%s",
addr_string, method, h?"HOSTNAME=":"", h);
```
which says h even when h is NULL.
issue