Add changelog for 6.4.0 release. (#3398)

* Add changelog for 6.4.0 release.

* Update CHANGES.md

ES storage column type changed for pxx details. It wouldn't really 100% compatible.
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吴晟 Wu Sheng 2019-09-03 15:26:24 -07:00 committed by GitHub
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@ -2,6 +2,64 @@ Changes by Version
==================
Release Notes.
6.4.0
------------------
#### Project
* Highly recommend to upgrade due to Pxx metrics calculation bug.
* Make agent working in JDK9+ Module system.
#### Java Agent
* Make agent working in JDK9+ Module system.
* Support Kafka 2.x client libs.
* Log error in OKHTTP OnFailure callback.
* Support injecting traceid into logstack appender in logback.
* Add OperationName(including endpoint name) length max threshold.
* Support using Regex to group operation name.
* Support Undertow routing handler.
* RestTemplate plugin support operation name grouping.
* Fix ClassCastException in Webflux plugin.
* Ordering zookeeper server list, to make it better in topology.
* Fix a Dubbo plugin incompatible issue.
* Fix MySQL 5 plugin issue.
* Make log writer cached.
* Optimize Spring Cloud Gateway plugin
* Fix and improve gRPC reconnect mechanism.
* Remove Disruptor dependency from agent.
#### Backend
* Fix Pxx(p50,p75,p90,p95,p99) metrics func bug.(Critical)
* Support Gateway in backend analysis, even when it doesn't have suitable language agent.
* Support using HTTPs SSL accessing ElasticSearch storage.
* Support Zookeeper ACL.
* Make alarm records listed in order.
* Fix Pxx data persistence failure in some cases.
* Fix some bugs in MySQL storage.
* Setup slow SQL length threshold.
* Fix TTL settings is not working as expected.
* Remove scope-meta file.
#### UI
* Enhance alarm page layout.
* Support trace tree chart resize.
* Support trace auto completion when partial traces abandoned somehow.
* Fix dashboard endpoint slow chart.
* Add radial chart in topology page.
* Add trace table mode.
* Fix topology page bug.
* Fix calender js bug.
* Fix "The "topo-services" component did not update the data in time after modifying the time range on the topology page.
#### Document
* Restore the broken Istio setup doc.
* Add etcd config center document.
* Correct span_limit_per_segment default value in document.
* Enhance plugin develop doc.
* Fix error description in build document.
All issues and pull requests are [here](https://github.com/apache/skywalking/milestone/35?closed=1)
6.3.0
------------------