Fix key name.

manifests/setup.pp

@@ -79,7 +79,7 @@ class irc_bouncer::setup {
 
   class { '::letsencrypt::plugin::dns_rfc2136':
     server              => 'ns-master.lysator.liu.se',
-    keyname             => 'verdigris.lysator.liu.se',
+    key_name            => 'verdigris.lysator.liu.se',
     key_algorithm       => 'HMAC-SHA256',
     key_secret          => 'YHR7/5gOkdPF64GwWRu6Ge8jcjz8siqCWIy/G8FsVzw=',
     propagation_seconds => 10,