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aa7d3d8e6d
At present, when curl_setopt() is called with an option that requires the creation of a curl_slist, we simply push the new curl_slist onto a list to be freed when the curl handle is freed. This avoids a memory leak, but means that repeated calls to curl_setopt() on the same handle with the same option wastes previously allocated memory on curl_slist structs that will no longer be read. This commit changes the zend_llist that was previously used to track the lists to a HashTable keyed by the option number, which means that we can simply update the hash table each time curl_setopt() is called. Fixes bug #65458 (curl memory leak).