modified:
  storage/connect/tabdos.cpp

- Separate alter.test in two to take care of unsupported LIBXML2
added:
  storage/connect/mysql-test/connect/r/alter_xml.result
  storage/connect/mysql-test/connect/t/alter_xml.test
modified:
  storage/connect/mysql-test/connect/r/alter.result
  storage/connect/mysql-test/connect/t/alter.test