Comment 2 for bug 1606859

See http://docs.sqlalchemy.org/en/latest/dialects/mysql.html#unicode

I believe we are doing this for MySQL by virtue of our docker_run.sh (or equivalent admn setup that follows that docker approach); and that SQLAlchemy defaults to 'utf8' encoding.

But arguably we should be using the MySQL-specific encoding 'utf8mb4', which allows for the full Unicode standard.