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.

* [TD-4872]<fix>: fix buffer overflow in -O3 build

* [TD-4872]<fix>: fix tasodemo buffer overflow with -O3

* [TD-4872]<fix>: fix tasodump buffer overflow with -O3

* [TD-3973]<feature>: add jemalloc as submodule.

* [TD-3973]<feature>: add jemalloc as submodule.

* [TD-3973]<feature>: use jemalloc.

build works as following instructions:

cmake .. -DJEMALLOC_ENABLED=true

make

* fix jemalloc at tag 5.2.1

* fix conflicts

* make install works.

* fix conflicts.

* release script works.
Co-authored-by: NShuduo Sang <sdsang@taosdata.com>

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

* fix typo.

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

* fix typo.