2. protect destruction of pSubs etc within tscFreeSubobj with subState.mutex

Tomchon patch 3

fix: syntax error when no fields in line

fix: filter unit is keeped when values and nulls exist in same block

fix(query): V24 the name of fields maybe contain many dot

fix: resolve an issue of index out-of-range in tscBuildQueryStreamDesc and etc

fix: resolve an assertion of index out of range in subAndCheckDone

fix: tag should not be null for filled rows

fix(query): V24 save row count with int16_t smaller

fix: return syntax error when schemaless line has no fields

avoid too many rpc recv thread

fix(rpc): conn auth failure

feat(rpc): V24 add send data failed log on rpc

docs\ update arbitrator command

docs\ update arbitrator command

fix: test cases

enh: validate alignment of sliding windows to fill with taosTimeTruncate and taosTimeCountInterval refactored