add documentation

bastelfreak · bastelfreak · commit be46a38d9fa1 · 2017-07-27T01:08:31.000+02:00
diff --git a/README.md b/README.md
@@ -327,6 +327,10 @@ Unacceptable input example:
 /usr2/username/bin:/usr/local/bin:/usr/bin:.
 ```
 
+#### `Stdlib::Mac'
+
+Matches MAC addresses defined in [RFC5342](https://tools.ietf.org/html/rfc5342).
+
 ### Facts
 
 #### `package_provider`
