Add StrictHostCheck

.. to allow ucnonfigured hostnames to be rejected. 

The checks happen during NVH mapping and checks that the
mapped VH itself has the host as a name or alias.



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1838055 13f79535-47bb-0310-9956-ffa450edef68