void call_new_user_funcs(struct userNode *user);
typedef void (*del_user_func_t) (struct userNode *user, struct userNode *killer, const char *why, void *extra);
void reg_del_user_func(del_user_func_t handler, void *extra);
void call_new_user_funcs(struct userNode *user);
typedef void (*del_user_func_t) (struct userNode *user, struct userNode *killer, const char *why, void *extra);
void reg_del_user_func(del_user_func_t handler, void *extra);