Use -dsaparam by default

  * Use -dsaparam by default for generation pem files.

Change-Id: I0af13af6583607d7f1d53034729c631223f904b3
Prod-related: PROD-26865 (PROD:26865)
diff --git a/README.rst b/README.rst
index 62ceab2..fa005ef 100644
--- a/README.rst
+++ b/README.rst
@@ -579,6 +579,7 @@
               dhparam:
                 enabled: True
                 numbits: 2048
+                use_dsaparam: True
               ecdh_curve:
                 secp384r1:
                   name: 'secp384r1'