Add new directive, <HostAlias>, very similar to <VirtualHost> in

function, but instead of binding the server to a new IP address, it
uses hostnames derived from the Host: header and/or full-URI
requests. (Requests that have neither will be served the documents as
given normally) The directive is of the form <HostAlias *.foo.com
foo.bar.net foo.com> (multiple entires seperated by spaces, with
wildcards).

Also, server->is_virtual is now set correctly in
init_virtual_host(). This was a long-standing bug, finially fixed.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@76417 13f79535-47bb-0310-9956-ffa450edef68