ZCML File
configure.zcml

<configure
    xmlns="http://namespaces.zope.org/zope"
    xmlns:zcml="http://namespaces.zope.org/zcml"
    zcml:condition="have zserver"
    >
<utility
    component=".servercontrol.serverControl"
    provides="zope.app.applicationcontrol.interfaces.IServerControl"
    />
<utility
    component=".wsgi.http"
    provides=".servertype.IServerType"
    name="WSGI-HTTP"
    />
<utility
    component=".wsgi.pmhttp"
    provides=".servertype.IServerType"
    name="WSGI-PostmortemDebuggingHTTP"
    />
<utility
    component=".ftp.server"
    provides=".servertype.IServerType"
    name="FTP"
    />
</configure>