Elasticsearch: Discontinue EOL version 6.8 thus whole V6

- Remove the whole V6 support as 6.8 was the last supported 6.x version.
- Update the elasticsearch home page accordingly.
- Add that removal information to each next 3.x.y release notes.

[1] https://www.elastic.co/support/eol

Change-Id: Ia535d699e87fba3561df9c3182fbda910f04eccb
diff --git a/pages/site/elasticsearch.md b/pages/site/elasticsearch.md
index 02c2f0e..41c6ab4 100644
--- a/pages/site/elasticsearch.md
+++ b/pages/site/elasticsearch.md
@@ -17,7 +17,7 @@
 | 6.5.x                 | 3.0.0       | 3.1.0 |       | Support discontinued in 3.0.9 and 3.1.5         |
 | 6.6.x                 | 3.0.0       | 3.1.0 | 3.2.0 | Support discontinued in 3.0.13, 3.1.9 and 3.2.4 |
 | 6.7.x                 | 3.0.0       | 3.1.0 | 3.2.0 | Support discontinued in 3.0.13, 3.1.9 and 3.2.4 |
-| 6.8.x                 | 3.0.2       | 3.1.0 | 3.2.0 |                                                 |
+| 6.8.x                 | 3.0.2       | 3.1.0 | 3.2.0 | Support discontinued in 3.1.11, 3.2.6 and 3.3.1 |
 | 7.0.x                 | 3.0.0       | 3.1.0 | 3.2.0 | See note below about upgrades                   |
 | 7.1.x                 | 3.0.1       | 3.1.0 | 3.2.0 |                                                 |
 | 7.2.x                 | 3.0.2       | 3.1.0 | 3.2.0 |                                                 |
diff --git a/pages/site/releases/3.1.md b/pages/site/releases/3.1.md
index e70b71d..a419a7d 100644
--- a/pages/site/releases/3.1.md
+++ b/pages/site/releases/3.1.md
@@ -308,6 +308,15 @@
 
 ## Bugfix Releases
 
+### 3.1.11 (in development)
+
+* Breaking Changes
+
+  * Elasticsearch: Support for [EOL version](https://www.elastic.co/support/eol)
+    6.8 is discontinued. This was the last supported minor version of
+    Elasticsearch 6 in Gerrit. From this release, Gerrit no longer supports V6
+    but only the already supported versions 7.x of Elasticsearch.
+
 ### 3.1.10
 
 * Breaking Changes
diff --git a/pages/site/releases/3.2.md b/pages/site/releases/3.2.md
index 149ad99..bfda5cb 100644
--- a/pages/site/releases/3.2.md
+++ b/pages/site/releases/3.2.md
@@ -598,6 +598,15 @@
 
 ## Bugfix Releases
 
+### 3.2.6 (in development)
+
+* Breaking Changes
+
+  * Elasticsearch: Support for [EOL version](https://www.elastic.co/support/eol)
+    6.8 is discontinued. This was the last supported minor version of
+    Elasticsearch 6 in Gerrit. From this release, Gerrit no longer supports V6
+    but only the already supported versions 7.x of Elasticsearch.
+
 ### 3.2.5.1
 
 * Bug Fixes
diff --git a/pages/site/releases/3.3.md b/pages/site/releases/3.3.md
index fe184bd..432fc40 100644
--- a/pages/site/releases/3.3.md
+++ b/pages/site/releases/3.3.md
@@ -488,3 +488,12 @@
   Fix NPE with StoredCommentLinkInfoSerializer when enabled is null
 
 ## Bugfix releases
+
+### 3.3.1 (in development)
+
+* Breaking changes
+
+  * Elasticsearch: support for [EOL version](https://www.elastic.co/support/eol)
+    6.8 is discontinued. This was the last supported minor version of
+    Elasticsearch 6 in Gerrit. From this release, Gerrit no longer supports V6
+    but only the already supported versions 7.x of Elasticsearch.