* a node. Default is xmalloc() or pooled allocation, depending
* on HASH_USE_POOL, HASH_AUTO_POOL, HASH_USE_ELTPOOL
* and HASH_AUTO_ELTPOOL switches. void free(void *) -- the converse.
* a node. Default is xmalloc() or pooled allocation, depending
* on HASH_USE_POOL, HASH_AUTO_POOL, HASH_USE_ELTPOOL
* and HASH_AUTO_ELTPOOL switches. void free(void *) -- the converse.