Naming consistency for storage engines and plugins

MariaDB [(none)]> SET GLOBAL gtid_pos_auto_engines = 'InnoDB,TokuDB,RocksDB';

Query OK, 0 rows affected (0.000 sec)

MariaDB [(none)]> show variables like 'gtid%';

+------------------------+-----------------------+

| Variable_name          | Value                 |

+------------------------+-----------------------+

| gtid_binlog_pos        | 10-15183-59           |

| gtid_binlog_state      | 10-15183-59           |

| gtid_current_pos       | 10-15183-59           |

| gtid_domain_id         | 10                    |

| gtid_ignore_duplicates | OFF                   |

| gtid_pos_auto_engines  | InnoDB,TokuDB,ROCKSDB |

| gtid_seq_no            | 0                     |

| gtid_slave_pos         |                       |

| gtid_strict_mode       | ON                    |

+------------------------+-----------------------+

9 rows in set (0.002 sec)