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Skip adding tls extensions to client hello when protocol version is
not TLS.
diff -up openssl-0.9.8g/ssl/t1_lib.c.no-extssl openssl-0.9.8g/ssl/t1_lib.c
--- openssl-0.9.8g/ssl/t1_lib.c.no-extssl	2007-10-19 09:44:10.000000000 +0200
+++ openssl-0.9.8g/ssl/t1_lib.c	2007-12-13 17:22:10.000000000 +0100
@@ -132,6 +132,11 @@ unsigned char *ssl_add_clienthello_tlsex
 	int extdatalen=0;
 	unsigned char *ret = p;
 
+	if (s->client_version != TLS1_VERSION && s->client_version != DTLS1_VERSION)
+	{
+		return ret;
+	}
+
 	ret+=2;
 
 	if (ret>=limit) return NULL; /* this really never occurs, but ... */