- Fix MDEV-5393 and MDEV-5434. It is a major update of ODBC catalog tables

processing that takes care of:
  - Drastically reduce the amount of storge needed to process them.
  - Handle longjmp's.
  - Makes the line limit an opion (MAXRES)
  - Schema can also be specified with the DBNAME option.
  - Issue warnings on fetch errors or when result lines have been limited.
  - Change some column names to reflect ODBC version 3 standard.
  The documentation have been updated accordingly

modified:
  storage/connect/filamdbf.cpp
  storage/connect/ha_connect.cc
  storage/connect/myconn.cpp
  storage/connect/mysql-test/connect/r/odbc.result
  storage/connect/mysql-test/connect/r/odbc_postgresql.result
  storage/connect/mysql-test/connect/r/odbc_sqlite3.result
  storage/connect/mysql-test/connect/r/odbc_xls.result
  storage/connect/mysql-test/connect/r/xml.result
  storage/connect/mysql-test/connect/t/odbc_postgresql.test
  storage/connect/odbccat.h
  storage/connect/odbconn.cpp
  storage/connect/odbconn.h
  storage/connect/plgdbsem.h
  storage/connect/plgdbutl.cpp
  storage/connect/rcmsg.c
  storage/connect/tabfmt.cpp
  storage/connect/table.cpp
  storage/connect/tabodbc.cpp
  storage/connect/tabodbc.h
  storage/connect/tabutil.cpp
  storage/connect/tabwmi.cpp
  storage/connect/user_connect.cc
  storage/connect/valblk.cpp
  storage/connect/valblk.h
  storage/connect/value.cpp

storage/connect/tabwmi.cpp

@@ -213,7 +213,7 @@ PQRYRES WMIColumns(PGLOBAL g, char *nsp, char *cls, bool info)
   qrp = PlgAllocResult(g, ncol, n, IDS_COLUMNS + 3,
                           buftyp, fldtyp, length, false, true);
 
-  if (info)
+  if (info || !qrp)
     return qrp;
 
   /*********************************************************************/