README, releases: add the release notes for 2.0.11 (pingcap#837)

README.md

@@ -159,6 +159,7 @@
 - [Frequently Asked Questions (FAQ)](FAQ.md)
 - [TiDB Best Practices](https://pingcap.com/blog/2017-07-24-tidbbestpractice/)
 + [Releases](releases/rn.md)
+  - [2.0.11](releases/2.0.11.md)
   - [2.1.2](releases/2.1.2.md)
   - [2.0.10](releases/2.0.10.md)
   - [2.1.1](releases/2.1.1.md)

releases/2.0.11.md

@@ -0,0 +1,21 @@
+---
+title: TiDB 2.0.11 Release Notes
+category: Releases
+---
+
+# TiDB 2.0.11 Release Notes
+
+On January 03, 2019, TiDB 2.0.11 is released. The corresponding TiDB-Ansible 2.0.11 is also released. Compared with TiDB 2.0.10, this release has great improvement in system compatibility and stability.
+
+## TiDB
+
+- Fix the issue that the error is not handled properly when PD is in an abnormal condition [#8764](https://github.com/pingcap/tidb/pull/8764)
+- Fix the issue that the `Rename` operation on a table in TiDB is not compatible with that in MySQL [#8809](https://github.com/pingcap/tidb/pull/8809) 
+- Fix the issue that the error message is wrongly reported when the `ADMIN CHECK TABLE` operation is performed in the process of executing the `ADD INDEX` statement [#8750](https://github.com/pingcap/tidb/pull/8750)
+- Fix the issue that the prefix index range is incorrect in some cases [#8877](https://github.com/pingcap/tidb/pull/8877) 
+- Fix the panic issue of the `UPDATE` statement when columns are added in some cases [#8904](https://github.com/pingcap/tidb/pull/8904)
+
+## TiKV
+
+- Fix two issues about Region merge
+[#4003](https://github.com/tikv/tikv/pull/4003), [#4004](https://github.com/tikv/tikv/pull/4004)

releases/rn.md

@@ -5,6 +5,7 @@ category: release
 
 # TiDB Release Notes
 
+- [2.0.11](../releases/2.0.11.md)
 - [2.1.2](../releases/2.1.2.md)
 - [2.0.10](../releases/2.0.10.md)
 - [2.1.1](../releases/2.1.1.md)