Add new define YASSL_PREFIX beforee including ssl.h to activate inclusion of prefix_*.h files

include/violite.h

@@ -102,6 +102,7 @@ void	vio_timeout(Vio *vio,uint which, uint timeout);
 
 #define HEADER_DES_LOCL_H dummy_something
 #define YASSL_MYSQL_COMPATIBLE
+#define YASSL_PREFIX
 #include <openssl/ssl.h>
 #include <openssl/err.h>