- Any temporary tables created under read-only mode will never be logged
  to binary log.  Any usage of these tables to update normal tables, even
  after read-only has been disabled, will use row base logging (as the
  temporary table will not be on the slave).
- Analyze, check and repair table will not be logged in read-only mode.

Other things:
- Removed not used varaibles in
  MYSQL_BIN_LOG::flush_and_set_pending_rows_event.
- Set table_share->table_creation_was_logged for all normal tables.
- THD::binlog_query() now returns -1 if statement was not logged., This
  is used to update table_share->table_creation_was_logged.
- Don't log admin statements in opt_readonly is set.
- Table's that doesn't have table_creation_was_logged will set binlog format to row
  logging.
- Removed not needed/wrong setting of table->s->table_creation_was_logged
  in create_table_from_items()