update REFERENCE.md

Author: trefzer

REFERENCE.md

@@ -1204,6 +1204,18 @@ The basic property that the resource should be in.
 
 Default value: `present`
 
+##### `group`
+
+group of the file
+
+##### `mode`
+
+mode of the file
+
+##### `owner`
+
+owner of the file
+
 #### Parameters
 
 The following parameters are available in the `dhparam` type.
@@ -1252,6 +1264,18 @@ The basic property that the resource should be in.
 
 Default value: `present`
 
+##### `group`
+
+group of the file
+
+##### `mode`
+
+mode of the file
+
+##### `owner`
+
+owner of the file
+
 #### Parameters
 
 The following parameters are available in the `ssl_pkey` type.
@@ -1314,6 +1338,18 @@ The basic property that the resource should be in.
 
 Default value: `present`
 
+##### `group`
+
+group of the file
+
+##### `mode`
+
+mode of the file
+
+##### `owner`
+
+owner of the file
+
 #### Parameters
 
 The following parameters are available in the `x509_cert` type.
@@ -1408,6 +1444,18 @@ The basic property that the resource should be in.
 
 Default value: `present`
 
+##### `group`
+
+group of the file
+
+##### `mode`
+
+mode of the file
+
+##### `owner`
+
+owner of the file
+
 #### Parameters
 
 The following parameters are available in the `x509_request` type.