monitor_set
struct monitor_set {
void monitor_destroy(struct monitor_set *);
void monitor_add(struct monitor_set *, const char *, enum monitor_type, int,
void monitor_remove(struct monitor_set *, const char *);
u_int monitor_get_fire_count(struct monitor_set *, const char *);
time_t monitor_get_fire_time(struct monitor_set *, const char *);