- Implement the NEWMSG and XMSG methods

They are still experimental and should not be used in production.
added:
  storage/connect/encas.h
  storage/connect/english.msg
  storage/connect/enids.h
  storage/connect/frcas.h
  storage/connect/french.msg
  storage/connect/frids.h
  storage/connect/frmsg.h
modified:
  storage/connect/connect.cc
  storage/connect/engmsg.h
  storage/connect/filamdbf.cpp
  storage/connect/global.h
  storage/connect/ha_connect.cc
  storage/connect/msgid.h
  storage/connect/plgdbutl.cpp
  storage/connect/plugutil.c
  storage/connect/rcmsg.c
  storage/connect/resource.h
  storage/connect/tabfmt.h

- Fix global variable not being properly initialized (MDEV-6690, MDEV-7094)
modified:
  storage/connect/ha_connect.cc
  storage/connect/plugutil.c
  storage/connect/user_connect.cc
  storage/connect/xindex.cpp

- Implement Rewind for ODBC tables (MDEV-7097)
modified:
  storage/connect/odbconn.cpp
  storage/connect/odbconn.h
  storage/connect/tabmysql.cpp
  storage/connect/tabodbc.cpp

- Reset N when reopening MYSQL tables
modified:
  storage/connect/tabmysql.cpp

storage/connect/tabmysql.cpp

@@ -859,6 +859,7 @@ bool TDBMYSQL::OpenDB(PGLOBAL g)
     /*  Table already open, just replace it at its beginning.          */
     /*******************************************************************/
     Myc.Rewind();
+    N = -1;
     return false;
     } // endif use