Remove support for opaque-prf

An expired IETF Internet-Draft (seven years old) that nobody
implements, and probably just as good as NSA DRBG work.

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

apps/s_cb.c

@@ -907,11 +907,6 @@ void tlsext_cb(SSL *s, int client_server, int type,
         extname = "renegotiation info";
         break;
 
-#ifdef TLSEXT_TYPE_opaque_prf_input
-    case TLSEXT_TYPE_opaque_prf_input:
-        extname = "opaque PRF input";
-        break;
-#endif
 #ifdef TLSEXT_TYPE_next_proto_neg
     case TLSEXT_TYPE_next_proto_neg:
         extname = "next protocol";

apps/s_client.c

@@ -1409,12 +1409,6 @@ int MAIN(int argc, char **argv)
         kssl_ctx_setstring(kctx, KSSL_SERVER, host);
     }
 #endif                          /* OPENSSL_NO_KRB5 */
-/*      SSL_set_cipher_list(con,"RC4-MD5"); */
-#if 0
-# ifdef TLSEXT_TYPE_opaque_prf_input
-    SSL_set_tlsext_opaque_prf_input(con, "Test client", 11);
-# endif
-#endif
 
  re_start:
 #ifdef NO_SYS_UN_H

apps/s_server.c

@@ -2183,11 +2183,6 @@ static int sv_body(char *hostname, int s, int stype, unsigned char *context)
             SSL_set_session_id_context(con, context, strlen((char *)context));
     }
     SSL_clear(con);
-#if 0
-# ifdef TLSEXT_TYPE_opaque_prf_input
-    SSL_set_tlsext_opaque_prf_input(con, "Test server", 11);
-# endif
-#endif
 
     if (stype == SOCK_DGRAM) {