[DOCS] Adds changelog to Elasticsearch Reference (#30311)

Author: lcawl

docs/CHANGELOG.asciidoc

@@ -1,20 +1,43 @@
+[[es-release-notes]]
+= {es} Release Notes
+
+[partintro]
+--
 // Use these for links to issue and pulls. Note issues and pulls redirect one to
 // each other on Github, so don't worry too much on using the right prefix.
 // :issue: https://github.com/elastic/elasticsearch/issues/
 // :pull: https://github.com/elastic/elasticsearch/pull/
 
-= Elasticsearch Release Notes
+This section summarizes the changes in each release.
+
+* <<release-notes-6.3.0>>
+
+--
+
+[[release-notes-6.3.0]]
+== {es} version 6.3.0
 
-== Elasticsearch version 6.3.0
+//[float]
+//[[breaking-6.3.0]]
+//=== Breaking Changes
 
-=== New Features
+//[float]
+//=== Breaking Java Changes
 
-=== Enhancements
+//[float]
+//=== Deprecations
 
-=== Bug Fixes
+//[float]
+//=== New Features
 
-=== Regressions
+//[float]
+//=== Enhancements
 
-=== Known Issues
+//[float]
+//=== Bug Fixes
 
+//[float]
+//=== Regressions
 
+//[float]
+//=== Known Issues

docs/reference/index-shared4.asciidoc

@@ -5,4 +5,4 @@ include::testing.asciidoc[]
 
 include::glossary.asciidoc[]
 
-include::release-notes.asciidoc[]
+include::{docdir}/../CHANGELOG.asciidoc[]

x-pack/docs/en/release-notes/6.0.0-alpha1.asciidoc

@@ -34,6 +34,5 @@ Watcher::
 
 See also:
 
-* <<release-notes-6.0.0-alpha1,{es} 6.0.0-alpha1 Release Notes>>
 * {kibana-ref}/release-notes-xkb.html[{kib} {xpack} Release Notes]
 * {logstash-ref}/release-notes-xls.html[Logstash {xpack} Release Notes]

x-pack/docs/en/release-notes/6.0.0-alpha2.asciidoc

@@ -39,6 +39,5 @@ Metadata fails, the update is now retried.
 
 See also:
 
-* <<release-notes-6.0.0-alpha2,{es} 6.0.0-alpha2 Release Notes>>
 * {kibana-ref}/release-notes-xkb.html[{kib} {xpack} Release Notes]
 * {logstash-ref}/release-notes-xls.html[Logstash {xpack} Release Notes]

x-pack/docs/en/release-notes/6.0.0-beta1.asciidoc

@@ -29,6 +29,5 @@ to `false` in your `elasticsearch.yml`. See
 
 See also:
 
-* <<release-notes-6.0.0-beta1,{es} 6.0.0-beta1 Release Notes>>
 * {kibana-ref}/release-notes-xkb.html[{kib} {xpack} Release Notes]
 * {logstash-ref}/release-notes-xls.html[Logstash {xpack} Release Notes]

x-pack/docs/en/release-notes/6.0.0-beta2.asciidoc

@@ -79,6 +79,5 @@ Watcher::
 
 See also:
 
-* <<release-notes-6.0.0-beta2,{es} 6.0.0-beta2 Release Notes>>
 * {kibana-ref}/release-notes-xkb.html[{kib} {xpack} Release Notes]
 * {logstash-ref}/release-notes-xls.html[Logstash {xpack} Release Notes]

x-pack/docs/en/release-notes/6.0.0-rc1.asciidoc

@@ -72,6 +72,5 @@ Watcher::
 
 See also:
 
-* <<release-notes-6.0.0-rc1,{es} 6.0.0-rc1 Release Notes>>
 * {kibana-ref}/release-notes-xkb.html[{kib} {xpack} Release Notes]
 * {logstash-ref}/release-notes-xls.html[Logstash {xpack} Release Notes]

x-pack/docs/en/release-notes/6.0.0-rc2.asciidoc

@@ -69,6 +69,5 @@ to require multiple binds when authenticating in user search mode.
 
 See also:
 
-* <<release-notes-6.0.0-rc2,{es} 6.0.0-rc2 Release Notes>>
 * {kibana-ref}/release-notes-xkb.html[{kib} {xpack} Release Notes]
 * {logstash-ref}/release-notes-xls.html[Logstash {xpack} Release Notes]