smarter xid-to-str routiine
    fixed assert crash in XA RECOVER
sql/sql_parse.cc
    XA COMMIT/ROLLBACK did not send_ok in some cases


sql/handler.cc:
  smarter xid-to-str routiine
  fixed assert crash in XA RECOVER
sql/sql_parse.cc:
  XA COMMIT/ROLLBACK did not send_ok in some cases