Reverting to old behaviour of writing the query before all rows
have been written.


mysql-test/r/rpl_row_delayed_ins.result:
  Result change
sql/sql_class.cc:
  Adding debug message to binlog_query()
sql/sql_insert.cc:
  - Changing write_delayed() to use a LEX_STRING for the query.
  - Adding query string to class delayed_row.
  - Removing query string from class delayed_insert.
  - Adding code to copy query string and delete it when the row
    is executed.
  - Logging query at first row instead of after all rows are 
    inserted (reverting to old behaviour).
  - Flushing the pending row event after all rows have been inserted.
    This is necessary since binlog_query() is called before all rows
    instead of after.
mysql-test/r/rpl_insert.result:
  New BitKeeper file ``mysql-test/r/rpl_insert.result''
mysql-test/t/rpl_insert.test:
  New BitKeeper file ``mysql-test/t/rpl_insert.test''