keep all "first end point"s' notation to "firstEp"

[TD-6256]<test> add subscribe case for go

[TD-6474]<hotfix>: fix coredump when merging empty block

[TD-6408]<fix>: fixed json error when timestamp was before Epoch

* nodejs/xiaolei/TD-2979-test-1970

* nodejs/xiaolei/TD-2979-test-1970

* nodejs/xiaolei/TD-2979-test-1970

* nodejs 1970 test&dry

* Jenkins&test1970

* ci fix test1970

* ci fix twice

* fix test1970 ci 3rd

[td-255] code refactor.

[TD-5929]<test> create testcases for TD-5929 ---> diff cols support or

Test/td 6009 modify test script [ci skip]

[ci skip]update jenkinsfile

[TD-6468]<test>: add test case for jdbc stmt

Docs/update latest feature

platforms.

[TD-6481]<enhance> The establishment of TCP connection failed due to …

* [TD-6294]<fix>: taosdemo support long arg

fix conflict with develop branch.

* fix few words.

* declare default child tables number.

* add support email prompt.

* support the way no space between param and value

* fix uncatched status.

* fix -PP arg.

* fix total child tables bug.

* fix taosdemo long args bug.

* fix default column number
Co-authored-by: NShuduo Sang <sdsang@taosdata.com>

* [TD-6294]<fix>: taosdemo support long arg

fix conflict with develop branch.

* fix few words.

* declare default child tables number.

* add support email prompt.

* support the way no space between param and value

* fix uncatched status.

* fix -PP arg.

* fix total child tables bug.

* fix taosdemo long args bug.
Co-authored-by: NShuduo Sang <sdsang@taosdata.com>

Co-authored-by: NShuduo Sang <sdsang@taosdata.com>

* [TD-5875]<featur>: taosdemo show progress

* empty commit for CI

* better msg for create child table.

* fix total child tables bug.

* fix INF rps if spent 0 ms to insert.

[TD-6424] <docs>: add English version of Docker guide.

doc: 7652

Update docs.md

Update docs.md

modify and review the English docs

[TD-2639] <docs>: remove dead link in English doc.