added:
  storage/connect/mysql-test/connect/r/alter_xml.result
  storage/connect/mysql-test/connect/t/alter_xml.test
modified:
  storage/connect/myconn.cpp
  storage/connect/mysql-test/connect/r/alter.result
  storage/connect/mysql-test/connect/t/alter.test
  storage/connect/tabdos.cpp