On the trunk:

mod_md: 
 * Improved interface to mod_ssl for fallback handling. Backward compatible to previous mod_ssl
   patch, but fallbacks will not work.
 * Provide a temporary, self-signed certificate with a speaking command and domain name if we
   have no other cert for a Managed Domain, yet. Refs github issue #32
 * Continue to provide expired or not-completely matching, existing certificate for a Managed
   Domain until the renewal was successful. This is helpful when one adds a DNS name to
   a MD, so the previous domains can be served while a new cert is requested.
 * All files necessary to run tests are not in the release package.
 * Making "http-01" the preferred challenge type again, as people "tls-sni-01" requires at least
   one working certificate vhost right now - which not everyone has.
 * moved part of the MD sanity checks from post_config to check_config phase, allowing for error
   detection in check-only runs.



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1807228 13f79535-47bb-0310-9956-ffa450edef68