* Make backend fits new topology query protocol and logic.

* Change topology line id.

* Change endpoint point id rule to match service relation id rule.

* Refactor util.

* Revert wrong refactor by IDEA.

* Revert some changes.

* Fix entity id bug.

* Fix endpoint topology query

* Update UI.

* UI license update.

* spring cloud gateways plugin

* Avoid webflux plugin generating many endpoints

* Add ALS proto and receiver in envoy

* Link Go agent project in main repo.

* Fix link.

* Update docker building of oap server

 * generating appliation.yml according to enviroment variables
 * adding Makefile to build binary and docker image

* Update ui docker

* Update docker-compose

* Update document

* Update document

* Merge from master

* Reset skywalking-ui

* New stream annotation.
- Inventory annotation example:
@Stream(name = ServiceInventory.INDEX_NAME, scopeId = DefaultScopeDefine.SERVICE_INVENTORY, storage = @storage(builder = ServiceInventory.Builder.class, deleteHistory = false), kind = StreamKind.Inventory)

- Metrics annotation example:
@Stream(name = ServiceRelationClientSideMetrics.INDEX_NAME, scopeId = DefaultScopeDefine.SERVICE_RELATION, storage = @storage(builder = ServiceRelationClientSideMetrics.Builder.class), kind = StreamKind.Metrics)

- Record annotation example:
@Stream(name = SegmentRecord.INDEX_NAME, scopeId = DefaultScopeDefine.SEGMENT, storage = @storage(builder = SegmentRecord.Builder.class), kind = StreamKind.Record)

- TopN annotation example:
@Stream(name = TopNDatabaseStatement.INDEX_NAME, scopeId = DefaultScopeDefine.DATABASE_SLOW_STATEMENT, storage = @storage(builder = TopNDatabaseStatement.Builder.class), kind = StreamKind.TopN)

* no message

* Stream annotation finish.

* Make stream processors to be the singleton class.

* Fixed the compile errors.

* Modify the OAL module for this annotation refactor.

* Add apache license header.

* Duplicate import.

* Fixed check style error.

* Provide plugin for ShardingSphere (#1933)

* Fix #2546

* Change the stackdepth type

* Fix bug

* Fix CI failed

* fix #2599

* fix ci

* add license

* add ActiveTag error methods

* fix

* fix

* nacos

* nacos

* nacos

* nacos

* fix ci

* support nacos cluster

* fix yml

* fix license

* fix ci

* remove optional

* update license

* update license and doc

* fix

* Fix #2546

* Change the stackdepth type

* Fix bug

* Fix CI failed

* fix #2599

* fix ci

* add license

* add ActiveTag error methods

* fix

* fix

* fix doc

* update doc

* update dependencyManagement

* fix

Add the second QQ group number.

* sync ui.

* update

* Fix #2546

* Rename metric to metrics.

* Fixed test case execute failure issues.

* clean up unnecessary times(1) for test verify

* format code

* fix checkstyle

fix doc_Trace Data Protocol v2_error #2620

* Using PowerMockito rathen then using reflection to mock System.getent;

* Run Test

* Trigger CI only on the master

* fix

* revert status interceptor.