Makes the default hashing algorithm for keys use MD5. The value can be set to either :c:type:`MEMCACHED_HASH_DEFAULT`, :c:type:`MEMCACHED_HASH_MD5`, :c:type:`MEMCACHED_HASH_CRC`, :c:type:`MEMCACHED_HASH_FNV1_64`, :c:type:`MEMCACHED_HASH_FNV1A_64`, :c:type:`MEMCACHED_HASH_FNV1_32`, :c:type:`MEMCACHED_HASH_FNV1A_32`, :c:type:`MEMCACHED_HASH_JENKINS`, :c:type:`MEMCACHED_HASH_HSIEH`, and :c:type:`MEMCACHED_HASH_MURMUR`.
Makes the default hashing algorithm for keys use MD5. The value can be set to either :c:type:`MEMCACHED_HASH_DEFAULT`, :c:type:`MEMCACHED_HASH_MD5`, :c:type:`MEMCACHED_HASH_CRC`, :c:type:`MEMCACHED_HASH_FNV1_64`, :c:type:`MEMCACHED_HASH_FNV1A_64`, :c:type:`MEMCACHED_HASH_FNV1_32`, :c:type:`MEMCACHED_HASH_FNV1A_32`, :c:type:`MEMCACHED_HASH_JENKINS`, :c:type:`MEMCACHED_HASH_HSIEH`, and :c:type:`MEMCACHED_HASH_MURMUR`.