Merge branch '6383-ah00548-namevirtualhost-has-no-effect-and-will-be-removed-in-the-next-release-etc-apache2' into 'develop'

Resolve "AH00548: NameVirtualHost has no effect and will be removed in the next release /etc/apache2/sites-enabled/000-ispconfig.vhost:7"

Closes #6383

See merge request ispconfig/ispconfig3!1634

Author: Till Brehm

install/dist/tpl/gentoo/apache_ispconfig.vhost.master

@@ -6,7 +6,7 @@
 
 {vhost_port_listen} Listen {vhost_port}
 <tmpl_if name='apache_version' op='<' value='2.4' format='version'>
-  NameVirtualHost *:{vhost_port}
+  # NameVirtualHost *:{vhost_port}
 </tmpl_if>
 
 <VirtualHost _default_:{vhost_port}>