hash_first
void *hash_first(struct hash *, unsigned int *);
hash_link *hash_first(hash_table *);
if (hash_first(_this->ctrl_map) != NULL)
for (hl = hash_first(_this->ctrl_map); hl != NULL;
for (hl = hash_first(_this->ctrl_map); hl != NULL;
for (hl = hash_first(_this->session_hash);
for (hl = hash_first(_this->session_hash); hl != NULL;
for (hl = hash_first(_this->session_hash); hl != NULL;