Building with CyaSSL failed compilation. Reason being that OCSP_REQUEST and
OCSP_RESPONSE are enum values in CyaSSL and defines in <wincrypt.h> included
via <winldap.h> in ldap.c.
http://curl.haxx.se/mail/lib-2012-06/0196.html
#endif
#ifdef USE_CYASSL
+#undef OCSP_REQUEST /* avoid cyassl/openssl/ssl.h clash with wincrypt.h */
+#undef OCSP_RESPONSE /* avoid cyassl/openssl/ssl.h clash with wincrypt.h */
#include <cyassl/openssl/ssl.h>
#endif