- Add include/index_merge*. Upstream has different files than MariaDB,
  use copies theirs, not ours.
- There was a prblem with running "DDL-like" commands with binlog=ON:
  MariaDB sets binlog_format=STATEMENT for the duration of such command
  to prevent RBR replication from catching (and replicating) updates to
  system tables.
  However, MyRocks tries to prevent any writes to MyRocks tables with
  binlog_format!=ROW.
- Added exceptions for DDL-type commands (ANALYZE TABLE, OPTIMIZE TABLE)
- Added special handling for "LOCK TABLE(s) myrocks_table WRITE".