MariaDB when encountering an old datetime type will add a suffix of /* mariadb-5.3 */
on its schema information page. Xorm does not understand this and then its mappings
The simplest solution is just to remove any fixed suffix and that is what this PR does
- a clever solution would look for and remove any comments or match them.
See https://mariadb.com/kb/en/time/ for more details about the comment.
Signed-off-by: Andrew Thornton <email@example.com>