config: don't reset connection info on disconnect.

If dbus is restarted, we try to connect again and this is difficult if the
busname and/or busobject is not set.

config/dbus.c

@@ -396,9 +396,6 @@ err_start:
 static void
 disconnect_hook(void *data)
 {
-    struct connection_info *info = data;
-
-    reset_info(info);
 }
 
 #if 0
@@ -440,4 +437,6 @@ void
 config_dbus_fini(void)
 {
     config_dbus_core_remove_hook(&core_hook);
+    connection_data.busname[0] = '\0';
+    connection_data.busobject[0] = '\0';
 }