keep 'incremental' for backward compatibility
keep 'incremental' for backward compatibility

Signed-off-by: Qun Li <1ea81f54854048d0a4d4fd61caceabb2a843281c@zstack.io>

MatheMatrix/zstack,zstackio/zstack,zstackorg/zstack,MatheMatrix/zstack,zstackio/zstack,zstackorg/zstack,MatheMatrix/zstack,AlanJager/zstack,zstackio/zstack,AlanJager/zstack,AlanJager/zstack