Use setProperties for IP Config.

components/onc/docs/onc_spec.html

Index: components/onc/docs/onc_spec.html
diff --git a/components/onc/docs/onc_spec.html b/components/onc/docs/onc_spec.html
index f4e70c808c956715b81a6564d755b8b156681511..1c26a3578e3a8db01bf2749ce622f8e5cf5e9a99 100644
--- a/components/onc/docs/onc_spec.html
+++ b/components/onc/docs/onc_spec.html
@@ -268,7 +268,8 @@
         <span class="type">IPConfig</span>
       </span>
       Each property set in this IPConfig object overrides the respective
-      parameter received over DHCP.
+      parameter received over DHCP. If the IPAddress property of the object is
+      unspecifed or empty, the network will be configured to use DHCP values.

[pneubeck (no reviews), 2014/11/25 21:13:34]

This reads very very contradicting. The dictionary name reads 'StaticIPConfig'
but it allows for Automatic (DHCP) configuration.
The 'IPConfig' type specifies that 'IPAddress' is a required field and that it
must be an IP address, i.e. non-empty. But this sentence allows for it to be
empty or unset.

Everywhere else in this document, if there were multiple alternative
configurations with different sets of parameters, a 'type' field was used and
depending on the type subdictionaries were required.
Analogously, this would mean in this case:

"IPConfigType" field of type string, value must be one of {"Automatic",
"Static"}, optional, defaults to "Automatic"

"StaticIPConfig" field of type IPConfig, required if IPConfigType==Static

[stevenjb, 2014/11/25 21:59:47]

I was trying to keep this reasonably simple, but do want to do this in a way
that makes sense to you also. I'm not sure I entirely follow your suggestion. I
think it might be easiest if you were to update the spec the way you would like
it and email it to me (or whatever), and I will implement it that way? Thanks!

[pneubeck (no reviews), 2014/11/27 18:55:01]

I started a CL only about the ONC change of IPConfig which I can finish
tomorrow.
Maybe that can save you some work.

     </dd>
 
     <dt class="field">SavedIPConfig</dt>
@@ -319,8 +320,8 @@
         <span class="value">false</span>, otherwise ignored)
         <span class="type">array of string</span>
       </span>
-      Array of addresses to use for name servers. If not specified, DHCP values
-      will be used.
+      Array of addresses to use for name servers. If not specified or empty,
+      DHCP values will be used.
     </dd>
 
     <dt class="field">SearchDomains</dt>