From: @chenyijie6
Reviewed-by: @wilfchen,@chujinjin
Signed-off-by: @chujinjin

From: @xiefangqi
Reviewed-by: @heleiwang,@liucunwei
Signed-off-by: @liucunwei

From: @huaweib
Reviewed-by: @zhoufeng54
Signed-off-by:

From: @zhoufeng54
Reviewed-by: 
Signed-off-by:

From: @tiancixiao
Reviewed-by: @heleiwang,@liucunwei
Signed-off-by: @liucunwei

From: @luoyang42
Reviewed-by: @heleiwang,@liucunwei
Signed-off-by: @liucunwei

From: @TFbunny
Reviewed-by: @liangchenghui,@wuxuejian
Signed-off-by: @liangchenghui

From: @wangyanling10
Reviewed-by: 
Signed-off-by:

From: @liubuyu
Reviewed-by: @zhoufeng54,@jjfeing
Signed-off-by: @jjfeing

This reverts commit b9f45b49ff.

From: @zyli2020
Reviewed-by: 
Signed-off-by:

From: @ezphlow
Reviewed-by: 
Signed-off-by:

From: @liyong126
Reviewed-by: @liucunwei,@heleiwang
Signed-off-by: @liucunwei

From: @xiefangqi
Reviewed-by: 
Signed-off-by:

From: @zengzitao
Reviewed-by: 
Signed-off-by:

From: @wenfangpei
Reviewed-by: 
Signed-off-by:

From: @ding_fei_fei
Reviewed-by: 
Signed-off-by:

From: @simson_wu
Reviewed-by: 
Signed-off-by:

From: @luopengting
Reviewed-by: @ouwenchang,@yelihua
Signed-off-by: @yelihua

From: @youui
Reviewed-by: @kisnwang,@zhoufeng54
Signed-off-by: @zhoufeng54

From: @TFbunny
Reviewed-by: @robingrosman,@liangchenghui
Signed-off-by: @liangchenghui

From: @Margaret_wangrui
Reviewed-by: 
Signed-off-by:

From: @liubuyu
Reviewed-by: @zhoufeng54,@jjfeing
Signed-off-by: @jjfeing

From: @xychow
Reviewed-by: @zh_qh,@ginfung
Signed-off-by: @zh_qh

MS_RDR_ENABLE should be in {0, 1}. if it is set as other value, it will
be 0 and WARNING information will be printed to tell user.
The settings in config file set by the user takes precedence over the
environment variables. If 'rdr_enable' is 0 in environment variable,
and then 'enable' is true in config file, the RDR will turned on.

From: @huaweib
Reviewed-by: @zhoufeng54,@kisnwang
Signed-off-by: @kisnwang

From: @wilfchen
Reviewed-by: @limingqi107,@cristoval
Signed-off-by: @cristoval

From: @tiancixiao
Reviewed-by: @heleiwang,@liucunwei
Signed-off-by: @liucunwei