log_addr_has_changed() does not heed SafeLogging
No IP address scrubbing is performed at any loglevel:
```
2694 if (!tor_addr_is_null(prev))
2695 log_fn(severity, LD_GENERAL,
2696 "Our IP Address has changed from %s to %s; "
2697 "rebuilding descriptor (source: %s).",
2698 addrbuf_prev, addrbuf_cur, source);
2699 else
2700 log_notice(LD_GENERAL,
2701 "Guessed our IP address as %s (source: %s).",
2702 addrbuf_cur, source);
```
issue