[TD-3642]<fix>: fix staging directory resource leak

[td-225]fix a invalid read.

[TD-3612]<fix>: fix vnode write msg double free issue

* [TD-3633] <fix>: fix taosdemo segfault.

* [TD-3633] <fix>: fix taosdemo segfault.

use snprintf instead of sprintf.
Co-authored-by: NShuduo Sang <sdsang@taosdata.com>

Docs/update latest feature

* [TD-3631] <fix>: increase max super table count to 10000

* [TD-3631] <fix>: use smaller max stb count due to data structure limit.
Co-authored-by: NShuduo Sang <sdsang@taosdata.com>

* [TD-3410]feature: adapted to nutz

* change

* change

* change

* change

* [TD-3447]<feature>: JDBC-RESTful and JDBC-JNI support setObject

* change

* change

* change

* change

* change

* change

* change

* change

* change

* change

* change

* change

* [TD-3548]<feature>: support ParameterMetaData in JDBC-RESTful and JDBC-JNI

* change

* change

* [TD-3446]<feature>: JDBC-JNI and JDBC-RESTful do not need invoke Class.forName any more

* change jdbc version

* change

* change

* change

* change

* change

* change

* change

* change

* change version

Update JDBCDemo.java

fix travis output

[TD-3314]<fix>: new staging directory for deleting vnodes

[TD-3274]<test> add case for TD-3274

remove  FResetVersion function

* [TD-3607] <fix>: fix taosdemo buffer overflow.

* [TD-3607] <fix>: taosdemo buffer overflow.

add tmp buffer.

* [TD-3607] <fix>: taosdemo buffer overflow.

fix data generation.

* [TD-3607] <fix>: taosdemo buffer overflow.

fix normal table writting.

* [TD-3607] <fix>: taosdemo buffer overflow.

remove tail spaces.

* [TD-3607] <fix>: taosdemo buffer overflow.

fix taosdemo alter table test case.

* [TD-3607] <fix>: taosdemo buffer overflow.

fix taosdemo alter table case.
Co-authored-by: NShuduo Sang <sdsang@taosdata.com>

[TD-3605]fix CQ memleak issue

[TD-3624] <docs>: fix minor typo.