Revert Struct for $config

Struct would require mentioning *all* possible variables, which is out
of scope for this feature.

Should consider just checking for certain variables compile-time.

manifests/init.pp

@@ -13,16 +13,7 @@
   String $config_file,
   String $owner,
   String $group,
-  Struct[{
-    'pid.file'    => String[1],
-    'root'        => String[1],
-    'server.cert' => String[1],
-    'server.key'  => String[1],
-    'server.crl'  => String[1],
-    'clinet.cert' => String[1],
-    'client.key'  => String[1],
-    'ca.cert'     => String[1],
-  }] $config,
+  Hash $config,
   Struct[{
     client => Struct[{
       cert => String[1],