Adding code to keep skipping events while inside a transaction. Execution
will start just after the transaction has been skipped.


sql/slave.cc:
  Adding code to set the thd->options flag for the slave SQL thread
  even when BEGIN, ROLLBACK, COMMIT, and XID events are being skipped.
      
  Adding code to not decrease the slave skip counter from 1 to 0 if we
  are inside a transaction. This will keep the counter at 1, and keep
  skipping events, until a transaction terminator is read. At that point,
  the slave skip counter will be decreased to 0, and events will be read
  and executed instead of read and skipped.
mysql-test/r/rpl_slave_skip.result:
  New BitKeeper file ``mysql-test/r/rpl_slave_skip.result''
mysql-test/t/rpl_slave_skip-slave.opt:
  New BitKeeper file ``mysql-test/t/rpl_slave_skip-slave.opt''
mysql-test/t/rpl_slave_skip.test:
  New BitKeeper file ``mysql-test/t/rpl_slave_skip.test''