File: //usr/share/webmin/virtual-server/help/template_realdomslimit.html
<header>Limit on number of non-alias servers</header>
If the domain owner has sub-server creation privileges, you may limit the number of non-alias servers that can be created here. Note that this limit cannot be effectively higher than the <b>Default limit on number of virtual servers</b>, as the overall limit on virtual servers applies to both alias and non-alias domains. A limit of <tt>0</tt> prevents the creation of non-alias servers completely.
<p>
This is useful if you want to allow a domain owner to create an unlimited or
higher number of alias servers, but limit the more expensive sub-servers he
can create. <p>
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