adding docs again

docs/_functions/domain/CNAME.md

@@ -0,0 +1,24 @@
+---
+name: CNAME
+parameters:
+  - name
+  - address
+  - modifiers...
+---
+
+CNAME adds a CNAME record to the domain. The name should be the relative label for the domain.
+Using `@` or `*` for CNAME records is not recommended, as different providers support them differently.
+
+Adress should be a string representing the CNAME target. If it is a single label we will assume it is a relative name on the current domain. If it contains *any* dots, it should be a fully qualified domain name, ending with a `.`.
+
+{% include startExample.html %}
+{% highlight js %}
+
+D("example.com", REGISTRAR, DnsProvider("R53"),
+  CNAME("foo", "google.com."), // foo.example.com -> google.com
+  CNAME("abc", "@"), // abc.example.com -> example.com
+  CNAME("def", "test.subdomain"), // def.example.com -> test.subdomain.example.com
+);
+
+{%endhighlight%}
+{% include endExample.html %}