File: //usr/share/webmin/virtual-server/help/mysql.html
<header>Create MySQL login?</header>
If selected, a MySQL account will be created for this domain, typically with
the same name as the domain's administrative login. If you are using the default
template settings, a MySQL database will be created for the virtual server
as well. The database name will be the first part of the domain name - so if
you are creating the domain <tt>foo.com</tt>, the database would be called
<tt>foo</tt>. <p>
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