mod_ssl_ct needs a per-vhost module config even if a vhost

doesn't contain mod_ssl_ct's own directives, because the
module config needs to represent that vhost's certificates.

PR: 57533


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1661540 13f79535-47bb-0310-9956-ffa450edef68