Make libssl opaque. Move all structures that were previously protected by

OPENSSL_NO_SSL_INTERN into internal header files.

Reviewed-by: Richard Levitte <levitte@openssl.org>

ssl/bio_ssl.c

@@ -63,7 +63,7 @@
 #include <openssl/crypto.h>
 #include <openssl/bio.h>
 #include <openssl/err.h>
-#include <openssl/ssl.h>
+#include "ssl_locl.h"
 
 static int ssl_write(BIO *h, const char *buf, int num);
 static int ssl_read(BIO *h, char *buf, int size);