Release Notes FIX BUGS: [TD-2887]: fix possible race condition coredump [TD-2962]: fix pContext NULL crash [TD-2886]: change the error code if the table has been removed and created again with different table schema before issuing query to a vnode.[TD-2910]: fix onlineDnodes > totalDnodes issue [TD-2643,TD-2925]: update sim test case and JDBCDemo doc [TD-2925]: rename keep2,keep1 -> keep1,keep0 [TD-2936]: change default path to follow mac standard. [TD-2923]: Not show databases in dropping [TD-2822]: fix invalid result set pointer bugs [TD-2875]: comment out stderr print to make crash_gen no Killed [TD-2918]: delet stable in mnode first before send dnode drop stable msg [TD-2402]: remove WINDOS macro related code in ttimer [TD-2402]: set rows <- 1 constantly when update http sql return success [TD-2901]: fix bug taosdemo with mono compiled does not exit. [TD-2402]: set rows <- 1 constantly when update http sql return success [TD-2885]: fix memory leak. [TD-2893]: fix http invalid url error typo. [TD-2875]: use monotonic clock source to fix leap-second issue ENHANCEMENTS: NEW FEATURES: [TD-2931]: add -y parameter to skip prompt. [TD-2771]: python version taosdemo. add native interface [TD-2005]: add ErrorNumber in JDBC driver [TD-2891]: get process cmdline by pid on mac. [TD-2555]: super table query support stddev query. DOCS: [TD-2639]: fix typo in example of alter table tags. [TD-2639]: fix software version number about STDDEV() on super table. TEST: [TD-2568]: add test case [TD-1351]: add test case [TD-2671]: add test case for STABLE [TD-2850]: add test case [TD-2801]: add test case