Function boring_sys::SSL_get_ex_new_index

pub unsafe extern "C" fn SSL_get_ex_new_index(
    argl: c_long, 
    argp: *mut c_void, 
    new_func: *mut c_int, 
    dup_func: Option<CRYPTO_EX_dup>, 
    free_func: Option<CRYPTO_EX_free>
) -> c_int