Add scripts fom easy.rsa old layout.

easy-rsa.OLD-LAYOUT/scripts/build-dh

@@ -0,0 +1,11 @@
+#!/bin/sh
+
+# Build Diffie-Hellman parameters for the server side
+# of an SSL/TLS connection.
+
+if [ -d $KEY_DIR ] && [ $KEY_SIZE ]; then
+    $OPENSSL dhparam -out ${KEY_DIR}/dh${KEY_SIZE}.pem ${KEY_SIZE}
+else
+    echo 'Please source the vars script first (i.e. "source ./vars")'
+    echo 'Make sure you have edited it to reflect your configuration.'
+fi