Put readOnly back in

Author: geraintluff

proposals/json-schema-hypermedia.xml

@@ -373,6 +373,16 @@
                 </section>
             </section>
 
+            <section title="readOnly">
+                <t>
+                    If it has a value of boolean true, this keyword indicates that the instance property SHOULD NOT be changed, and attempts by a user agent to modify the value of this property are expected to be rejected by a server.
+                </t>
+                <t>
+                    The value of this keyword MUST be a boolean.
+                    The default value is false.
+                </t>
+            </section>
+
             <section title="pathStart">
                 <t>
                     This property is a URI that defines what the instance's URI MUST start with in order to validate.