Georg's changes to make mariadb_flush_multi_command working (reading result of multi-command).
Georg's changes to make mariadb_flush_multi_command working (reading result of multi-command).

ottok/mariadb-connector-c,MariaDB/mariadb-connector-c,ottok/mariadb-connector-c,MariaDB/mariadb-connector-c,MariaDB/mariadb-connector-c,ottok/mariadb-connector-c