Remove SSLOCSPUseRequestNonce OpenSSL-0.9.7 requirement (0.9.8 already required by httpd-2.4) and set availability to 2.5-dev until further notice.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1584665 13f79535-47bb-0310-9956-ffa450edef68