Function nginx::UI_add_input_boolean

pub unsafe extern "C" fn UI_add_input_boolean(
    ui: *mut UI, 
    prompt: *const c_char, 
    action_desc: *const c_char, 
    ok_chars: *const c_char, 
    cancel_chars: *const c_char, 
    flags: c_int, 
    result_buf: *mut c_char
) -> c_int