Man pages matching name memcached_server_list_free in section 3:

memcached_server_list_free.3.en	debian 10 / libmemcached-dev
memcached_server_list_free.3.en	debian 11 / libmemcached-dev
memcached_server_list_free.3.en	debian 12 / libmemcached-dev