openssl_sys::SSL_CTX_get_ex_new_index

pub unsafe extern fn SSL_CTX_get_ex_new_index(argl: c_long, argp: *const c_void, new_func: Option<CRYPTO_EX_new>, dup_func: Option<CRYPTO_EX_dup>, free_func: Option<CRYPTO_EX_free>) -> c_int