Now it is also possible to escape it by a backslash.
  modified:   storage/connect/tabfmt.cpp

- Prepare making VEC table type support conditional.
  VEC tables might be unsupported in future versions
  modified:   storage/connect/CMakeLists.txt
  modified:   storage/connect/mycat.cc
  modified:   storage/connect/reldef.cpp
  modified:   storage/connect/xindex.cpp

- MDEV-11067 suggested to add configuration support to the Apache wrapper.
  Was added but commented out until prooved it is really useful.
  modified:   storage/connect/ApacheInterface.java
  modified:   storage/connect/ha_connect.cc
  modified:   storage/connect/jdbccat.h
  modified:   storage/connect/jdbconn.cpp
  modified:   storage/connect/jdbconn.h
  modified:   storage/connect/tabjdbc.cpp
  modified:   storage/connect/tabjdbc.h

- Remove useless members.
  modified:   storage/connect/jdbconn.cpp
  modified:   storage/connect/jdbconn.h

- New UDF countin.
  modified:   storage/connect/jsonudf.cpp
  modified:   storage/connect/jsonudf.h