knownnetworks: copy network_config on update

The network_config was not being copied to network_info when
updated. This caused any new settings to be lost if the network
configuration file was updated during runtime.

src/knownnetworks.c

@@ -464,6 +464,8 @@ void known_network_update(struct network_info *network,
 	}
 
 	known_network_set_autoconnect(network, new->is_autoconnectable);
+
+	memcpy(&network->config, new, sizeof(struct network_config));
 }
 
 bool known_networks_foreach(known_networks_foreach_func_t function,