[TD-4417]<fix>: return database not ready if vnode status & role not …

[TD-4243]<fix>:fix coredump when select _block_dist() from table

* [TD-4068]<feature>: taosdemo support stmt.

for easy merge purpose. disabled in master.

* fix clang compile error.

* fix memory leak, add more macros. change sqlcount to int
Co-authored-by: NShuduo Sang <sdsang@taosdata.com>

* [TD-4406]<fix>: taosdemo auto create table.

* fix child table exists or auto create logic.

* reduce redundant conditions.
Co-authored-by: NShuduo Sang <sdsang@taosdata.com>

[TD-4411]taos hangs for invalid character

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

This reverts commit 0c4075e0.

* [TD-3913]<fix>: mips compile support.

* [TD-3912]<fix>: support mips64 compile.

add mips64 header file and modify tcrc32c.c for mips64.

* [TD-3913]<fix>: mips compile support.

verified on real loongson machine.

* fix cmake.

* fix gcc 4.8 compile error.

* fix clang compile error.
Co-authored-by: NShuduo Sang <sdsang@taosdata.com>

* [TD-4406]<fix>: taosdemo auto create table.

* fix child table exists or auto create logic.
Co-authored-by: NShuduo Sang <sdsang@taosdata.com>

* [TD-4068]<feature>: taosdemo support stmt.

for easy merge purpose. disabled in master.

* fix clang compile error.

Hotfix/crashgen

Test/td 4376

* [TD-4382]<fix>: taosdemo query result file is null.

* modify CI
Co-authored-by: NShuduo Sang <sdsang@taosdata.com>
Co-authored-by: Nliuyq-617 <yqliu@taosdata.com>

[TD-3279]<fix>: memory link while perform delete action

commit 0c81e3c0ba89c86f6d17d51d5056146e177cace5
Author: Huo Linhe <linhehuo@gmail.com>
Date:   Fri May 14 10:27:13 2021 +0800

    [TD-4160]<fix>: remove python connector soft links, fix tests and documents

commit f439fce413423e7d7c97eef180c93d63dedab32e
Author: Huo Linhe <linhehuo@gmail.com>
Date:   Wed May 12 18:50:53 2021 +0800

    [TD-182]: bump python connector version to v2.0.10 (#6091)

    Also fix url error in setup.py

commit 4ae55d494a262e482f6b34e8bf193cc6af62a886
Author: Huo Linhe <linhehuo@gmail.com>
Date:   Wed May 12 09:49:26 2021 +0800

    [TD-4370]<fix>: merge python connector changes to master

    Inludes:

    [TD-182]<enhance>: use single repo for python connector (#6036)

    * [TD-182]<enhance>: use single repo for python connector

    Remove code for each platform and build up one single python code base
    for windows/osx/linux platforms and python2/python3 runtime.

    * [TD-182]<enhance>: remove redundant code in python connector

    * [TD-4149] <fix>: fix python connection config error

[TD-4355]<fix>

Fix/query

[td-4372]<fix>: fix the taosd server crash caused by dropping a child table, of which the indexed tag value is null.

Fix/query

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

TD-3279 TD-4328