Function nginx::UI_add_verify_string

pub unsafe extern "C" fn UI_add_verify_string(
    ui: *mut UI, 
    prompt: *const c_char, 
    flags: c_int, 
    result_buf: *mut c_char, 
    minsize: c_int, 
    maxsize: c_int, 
    test_buf: *const c_char
) -> c_int