ZCML File
httpplugins.zcml

<configure
    xmlns="http://namespaces.zope.org/browser"
    i18n_domain="zope"
    >
<addMenuItem
    title="HTTP Basic-Auth Plugin"
    permission="zope.ManageServices"
    class="..httpplugins.HTTPBasicAuthCredentialsPlugin"
    />
<editform
    name="edit.html"
    schema="..httpplugins.IHTTPBasicAuthRealm"
    permission="zope.ManageServices"
    label="Realm"
    menu="zmi_views"
    title="Edit"
    />
</configure>