Ensure that all MySQL 5.6 options are supported by the MariaDB 10.0 server

Like we did with:
--table-open-cache-instances=#
MySQL 5.6 compatible option. Not used or needed in MariaDB

• Add all non existing options in 5.6 to 10.0; For options we don't plan to do, we should use a comment as above. For things we plan to do the comment should be 'MySQL 5.6 option be implemented in later 10.x versions'

• Add all missing options to the exusting 10.0 <-> 5.6 compatibility section in https://mariadb.com/kb/en/mariadb-vs-mysql-compatibility/

• Generate a warning for each use of an option that is not yet implemented

• Add support for options of the most popular plugins as well (InnoDB, MyISAM)

The following options exist in 5.6 but not in 10.0:

• default-tmp-storage-engine (to be implemented)
• log-raw (not needed)
• default-authentication-plugin (to be implemented)
• ignore-db-dir (served by ignore-db-dirs by shortening command line option, won't add)
• binlog-max-flush-queue-time (not needed)
• binlog-row-image (to be implemented)
• explicit-defaults-for-timestamp (to be implemented)
• master-info-repository (not needed)
• relay-log-info-repository (not needed)
• binlog-rows-query-log-events (suggest binlog-annotate-row-events)
• binlog-order-commits (not needed)
• log-throttle-queries-not-using-indexes (to be implemented)
• end-markers-in-json (to be implemented)
• optimizer-trace (to be implemented)
• optimizer-trace-features (to be implemented)
• optimizer-trace-offset (to be implemented)
• optimizer-trace-limit (to be implemented)
• optimizer-trace-max-mem-size (to be implemented)
• eq-range-index-dive-limit (to be implemented)
• server-id-bits (not needed)
• slave-rows-search-algorithms (to be implemented)
• table-open-cache-instances (not needed)
• slave-allow-batching (to be implemented)
• slave-checkpoint-period (not needed)
• slave-checkpoint-group (not needed)
• slave-parallel-workers (suggest slave-parallel-threads)
• slave-pending-jobs-size-max (suggest slave-parallel-max-queued)
• enforce-gtid-consistency (Kristian suggests no compatibility option)
• gtid-mode (Kristian suggests no compatibility option)
• disconnect-on-expired-password (to be implemented)
• sha256-password-private-key-path (sha256_password plugin, to be implemented)
• sha256-password-public-key-path (sha256_password plugin, to be implemented)

The following options exist in 5.5 and 5.6 but not in 10.0:

• abort-slave-event-count (suggest debug-abort-slave-event-count)
• disconnect-slave-event-count (suggest debug-disconnect-slave-event-count)
• exit-info (suggest debug-exit-info)
• max-binlog-dump-events (suggest debug-max-binlog-dump-events)
• sporadic-binlog-dump-fail (suggest debug-sporadic-binlog-dump-fail)
• new (not needed)
• skip-new (will be served by "new", won't add)
• skip-stack-trace (served by "stack-trace" option, won't add)

The following options were added after 5.6.10:

• innodb-buffer-pool-evict // UNIV_DEBUG (to be implemented, but won't add per Serg's suggestion)
• innodb-ft-total-cache-size (to be implemented, but won't add per Serg's suggestion)
• innodb-ft-result-cache-limit (to be implemented, but won't add per Serg's suggestion)
• innodb-log-compressed-pages (to be implemented, but won't add per Serg's suggestion)
• innodb-log-checkpoint-now // UNIV_DEBUG (to be implemented, but won't add per Serg's suggestion)
• rpl-stop-slave-timeout (to be implemented)
• validate-user-plugins (to be implemented)

The following NO_CMD_LINE options exist in 5.6 but not in 10.0 (won't add them):

• gtid-executed
• gtid-next
• gtid-next-list
• gtid-owned
• gtid-purged
• log-bin-basename
• relay-log-basename
• server-uuid
• transaction-allow-batching