Make supported list more clear.

Fix it to follow the [REPORTING GUIDELINES](CODE_OF_CONDUCT.md#reporting-guidelines).

Fixed wrong parameter

* Add CLR metric scope and oal_script

* Add max indicator

* Fix checkstyle

* Add envoy metrics service protos

This patch imports protos from envoyproxy/data-plane-api and
prometheus/client_model to enable metrics service service feature in
SkyWalking OAP.
Signed-off-by: NDhi Aurrahman <dio@tetrate.io>

* Add Envoy related docs
Signed-off-by: NDhi Aurrahman <dio@tetrate.io>

* Update the LICENSE to include new protos license

From:
- envoyproxy/data-plane-api
- prometheus/client_model
Signed-off-by: NDhi Aurrahman <dio@tetrate.io>

* Add a complete config.yaml example
Signed-off-by: NDhi Aurrahman <dio@tetrate.io>

* Add note on Envoy dynamic config
Signed-off-by: NDhi Aurrahman <dio@tetrate.io>

* Add protoc-gen-validate license
Signed-off-by: NDhi Aurrahman <dio@tetrate.io>

* Add samples
Signed-off-by: NDhi Aurrahman <dio@tetrate.io>

* Make CI and license right.

* Update README.md

@dhi typo :P

* Update README.md

Another typo :P

* Delete metrics.json

metrics.json is included in identify.json and not be linked in document.

* Update and rename Spring-bean-plugins.md to Spring-annotation-plugin.md

* Update README.md

* Update README.md

* Add peer to entry span

* Fix CI

* Make scope meta configurable.

* Fix test cases in ci.

* Change step 1

* Refactor step 2

* Other compile issue done. Prepare the generator changes.

* Revert some wrong changes to Istio receiver.

* Step 3, make compile pass.

* Try to make CI passed.

* Add a check.

* Fix generated code style

* Provide new and extendable dispatcher generator tool

* Fix startup.

* Can't guarantee the dispatchers are always existing. Put explicit comments at there to avoid confusion, since this is different with old version.

* Fix a H2 query for endpoint search.

* Fix a wrong mysql alarm query.

* Provide new document and `generate-tool-grammer` module.

* Add missing last section of document.

* Fix typo

* Relocate the @ScopeDeclaration annotation, make it more sense. Also remove the useless @SourceType annotation. And adjust document for these changes

* ScopeDeclaration can be used once for each class only, now.

* Sync UI

* Sync Fix ui bug

* add serviceInstanceId in Segment storage.

* add serviceInstanceId in query condition.

* Fix ArrayIndexOutOfBoundsException when intercepting net.spy.memcached.MemcachedClient.getStats()

* revert format

* Update user wall.

* Add a missing website.

- Set WORKDIR to skywalking
 - Change base image to openjdk:8u181-jdk-stretch which contains java tool-chains

* Refactor for cluster mode.

* Make send to L2 in certain cycle.

ADD China Eastern Airlines .Thanks

* Try adjustment.

* Remove heartbeat.

* Make heartbeat back to work. And default threadpool size more sense.

* Make L2 to less than before.

* Make instance heartbeat works.

* Try L1 aggregation thread = core * 2 * 2.

* Correct trace id.

* Fix match.

* Add cover token to retry.

* Retry new test plugin.

* Reset to jacoco.

* Update jacoco version.

* Update powered-by.md

* Update powered-by.md

Change list order.

[Performance Improvement]Backend streaming thread model improvement

* Zookeeper plugin

* Extend consume pool to data carrier.

* Change indicator aggregate worker and persistent worker to use default consumer pool.

* Fix CI.

* Support to register different host/port at cluster coordinator. Only for Zookeeper and Consul

* Provide document for internalComHost and internalComPort

* Reset port to default.

* fix no language attr value in mesh

* Fixed docker issues

* The prototype of topN sql worker.

* Add scope and new manual dispatcher.

* no message

* Finish topN persistence codes. Not test yet. And query have not added.

* Finish the top n database statement persistent.

* Support different slow thresholds for different db types.

* Fix wrong db default threshold

* Finish new query protocol binding.

* Provide query empty implementation and sync ui.

* Finish all codes, hope it works :P
I will run the tests tonight.

* Fix

* Fix

* Fix a startup issue.

* Add time bucket to persistent.

* Fix wrong query result column name.

* Fix Database query.

* Fix checkstyle.

* Fix wrong order logic, and add a test case to verify, to fix https://github.com/apache/incubator-skywalking/pull/2239#discussion_r255948249

* Make sure all document images ref from our Apache website.

* Change the statement.

* Update README.md

* Update powered-by.md

* Fixed an error that took a non-protocol uri string as a java.net.URL construct parameter.

* Fixed an error that took a non-protocol uri string as a java.net.URL construct parameter.

* Fixed checkstyle error.