Can't add a site if there is a dash in the title

`n sites-add site-with-dashes` errors out with `ERROR 1064 (42000) at line 1: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near '-with-dashes.* TO 'wordpress'@'%' IDENTIFIED BY 'wordpress' WITH GRANT OPTION' at line 1`

This is not a huge nuisance, but still not desired.

Start by reproducing `n sites-add site-with-dashes` and inspect the SQL generated by that command, using the MariaDB error to locate the failing database-name handling. Done means a site title containing dashes is added successfully without the SQL syntax error.

Written by the indexing model from the issue text.