make properly sure that the wifi password does not get logged

Two of these were properly stupid :(

LP: #1636421 (again)

subiquitycore/controllers/network.py

@@ -192,9 +192,7 @@ def sanitize_config(config):
     """Return a copy of config with passwords redacted."""
     config = copy.deepcopy(config)
     for iface, iface_config in config.get('network', {}).get('wifis', {}).items():
-        log.debug("%s %s", iface, iface_config)
         for ap, ap_config in iface_config.get('access-points', {}).items():
-            log.debug(" - %s %s", ap, ap_config)
             if 'password' in ap_config:
                 ap_config['password'] = '<REDACTED>'
     return config

subiquitycore/signals.py

@@ -66,7 +66,8 @@ class Signal:
             urwid.emit_signal(self, 'menu:welcome:main')
 
     def emit_signal(self, name, *args, **kwargs):
-        log.debug("Emitter: {}, {}, {}".format(name, args, kwargs))
+        # Disabled because it can reveal credentials in the arguments.
+        #log.debug("Emitter: {}, {}, {}".format(name, args, kwargs))
         if name.startswith("menu:"):
             log.debug(" emit: before: "
                       "size={} stack={}".format(len(self.signal_stack),