[TD-2947]<fix>when update version, first stop nginx

Feature/linux

fix memory leak

[TD-2887]<hotfix>: fix possible race condition coredump

[TD-2843] feature: porting python connector for mac.

[TD-2568]<test>: add test case

[TD-2932]

[TD-2926]client crashes when running crash_gen test

[TD-2948]client crashes when building stddev query msg

[TD-2944]taosd crashes when executing stddev query

Fix several minor typo things in docs.

[TD-2893] <fix>: fix http invalid url error typo.

fix

cancel build excluded regions stategy

[TD-2518]support query data before 1970

Feature/linux