* fix crash if no result file.

* make taosdemo same as master branch.

* decrease few debug print level.

[td-4927]<enhance>:ignore the rows of expired timestamp that are not dropped yet during query according to the TTL settings.

* fix warn mesage in jdbc

* change

* [TD-4876]<fix>: fix getNetworkTimeout and setNetworkTimeout in jdbc driver

* [TD-4117]<test>: remove System.out.println in all jdbc test cases

* change

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

1. rename semphone to semaphore
2. add comment for tsched.h
3. change the function signature for taosSchedulerTask, changing from
return int to void. We currently don't check any return code of the function.
4. add some error handlings. For fatal error, just exit the process because
the program may run into a random state.

* fix crash if no result file.

* make taosdemo same as master branch.

* [TD-4902] FIX with 1 char

* Fix prompt of -m @ taosdemo

* [TD-4823]<fix>: taosdemo getTableName return empty.

* fix typo.

* check table name is empty in early stage.
Co-authored-by: NShuduo Sang <sdsang@taosdata.com>

* [TD-4892]<fix>: taosdemo subscribe fetch result. for develop branch

* fix stbname length.

* restrict prefix length.

* submit empty

* fix minor code.