-void opt_handle_config(struct opt_item * opt, const char * value, void * data);
-void opt_handle_set(struct opt_item * opt, const char * value, void * data);
-void opt_handle_dumpconfig(struct opt_item * opt, const char * value, void * data);
-void opt_conf_hook_internal(struct opt_item * opt, uint event, const char * value, void * data);
+void opt_handle_config(const struct opt_item * opt, const char * value, void * data);
+void opt_handle_set(const struct opt_item * opt, const char * value, void * data);
+void opt_handle_dumpconfig(const struct opt_item * opt, const char * value, void * data);
+void opt_conf_hook_internal(const struct opt_item * opt, uint event, const char * value, void * data);