warden_ra: Config for Apache 2.4 added

warden3/contrib/warden_ra/apache24.conf

+SSLEngine on
+
+SSLVerifyClient optional
+SSLOptions +StdEnvVars +ExportCertData
+
+SSLCertificateFile      /opt/warden_server_3/cert.pem
+SSLCertificateKeyFile   /opt/warden_server_3/key.pem
+SSLCACertificateFile    /opt/warden_server_3/chain_TERENA_SSL_CA_3.pem
+
+WSGIScriptAlias /warden_ra /opt/warden-ra/warden_ra.wsgi
+
+<Directory /opt/warden-ra/warden_ra.wsgi>
+    Require all granted
+</Directory>