[incubator-skywalking] branch 6.0 updated: Update README.md

[wu...@apache.org]

This is an automated email from the ASF dual-hosted git repository.

wusheng pushed a commit to branch 6.0
in repository https://gitbox.apache.org/repos/asf/incubator-skywalking.git


The following commit(s) were added to refs/heads/6.0 by this push:
     new de7994f  Update README.md
de7994f is described below

commit de7994ff719d2a7825cb1b9580b6c858c454c3d0
Author: 吴晟 Wu Sheng <wu...@foxmail.com>
AuthorDate: Sat Sep 1 19:58:06 2018 +0800

    Update README.md
---
 docs/README.md | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/docs/README.md b/docs/README.md
index 42a7b32..cdf3dae 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -24,5 +24,12 @@ Also, if you have some related to us, welcome to submit a pull request to add.
 if you see some problem. 
 Or better yet, submit your own contributions through pull request to help make them better.
 
+___
+### Users from 5.x
+SkyWalking 5.x is still supported by the community. For the user plans to upgrade from 5.x to 6.x, you should know there are some definitions of concepts changed.
+
+The most important two changed concepts are
+1. Applciation(in 5.x) is changed to **Service**(in 6.x), also Application Instance is changed to **Service Instance**.
+1. Service(in 5.x) is changed to **Endpoint**(in 6.x).