Feature/td 5992 set configure once

td-5925

[TD-6638]<fix>: OpenTSDB telnet line tags should be separated using whitespace not comma

<TD-6636><hotfix>: row convert fix and schema version fetch optimize

Docs/update latest feature

* [TD-5136]<feature>: taosdemo simulate real senario.

* update test case according to taosdemo change

* adjust range of semi-random data.

* make demo mode use different tag name and value.

* change malloc to calloc for pid allocation.

* fix typo.

* fix binary length default value and group id logic.

* fix help msg.

* fix aggregation func test.

* minor typo fix.
Co-authored-by: NShuduo Sang <sdsang@taosdata.com>

[TD-2573]<feature>: ceil, floor and round functions are supported

[TD-7857]<doc>:add missing connectors

[TD-5641] <docs>: fix parameter bufsize format in UDF.