Add support for MariaDB

[macbre]

• docker images - https://hub.docker.com/_/mariadb/

RELEASE	GA DATE	SUPPORT END	EXT. SUPPORT END
MySQL Database 5.0	Oct 2005	Dec 2011	n.a.
MySQL Database 5.1	Dec 2008	Dec 2013	n.a.
MySQL Database 5.5	Dec 2010	Dec 2015	Dec 2018
MySQL Database 5.6	Feb 2013	Feb 2018	Feb 2021
MySQL Database 5.7	Oct 2015	Oct 2020	Oct 2023
MySQL Database 8.0	expected 2017	unknown	unknown

MAJOR VERSION	GA DATE	5 YEAR BOUNDARY DATE
MariaDB Database 5.1	Feb 2010	Feb 2015
MariaDB Database 5.2	Nov 2010	Nov 2015
MariaDB Database 5.3	Feb 2012	Mar 2017
MariaDB Database 5.5	Dec 2014	Dec 2017
MariaDB Database 10.0	Jun 2014	Jun 2019
MariaDB Database 10.1	Jan 2016	Jan 2021
MariaDB Database 10.2	expected early 2017	unknown
MariaDB Database 10.3	expected 2018	unknown

http://www.fromdual.com/support-for-mysql-from-oracle

[macbre]

index_digest mysql://index_digest:qwerty@127.0.0.1/index_digest --sql-log sql/0002-not-used-indices-log
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Found 36 issue(s) to report for "index_digest" database
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MySQL v10.2.10-MariaDB-10.2.10+maria~jessie at a687f2a9cc47
index-digest v0.1.0
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