Was an unprepared longjmp (now throw)
Also fix a wrong calculation of To_Line sometimes causing a crash
because of buffer overflow.
  modified:   storage/connect/tabdos.cpp

Fix a wrong setting of USER for JDBC tables in connect_assisted_discovery.
Update jdbc_new.test after that fix, which changed errors.
  modified:   storage/connect/ha_connect.cc
  modified:   storage/connect/mysql-test/connect/r/jdbc_new.result
  modified:   storage/connect/mysql-test/connect/t/jdbc_new.test

Make using try/catch/throw the default option
  modified:   storage/connect/CMakeLists.txt

Typo
  modified:   storage/connect/xindex.cpp