Remove SSLv2 support

The only support for SSLv2 left is receiving a SSLv2 compatible client hello.

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

demos/ssl/cli.cpp

@@ -38,7 +38,7 @@ void main ()
   SSL_METHOD *meth;
 
   SSLeay_add_ssl_algorithms();
-  meth = SSLv2_client_method();
+  meth = SSLv23_client_method();
   SSL_load_error_strings();
   ctx = SSL_CTX_new (meth);                        CHK_NULL(ctx);