added clone_with_v2 functionality.

https://wiki.php.net/rfc/clone_with_v2

Author: mumumu

appendices/migration85/new-features.xml

@@ -178,6 +178,18 @@ print T1 . PHP_EOL;   // Prints "0"
 
   </sect3>
 
+  <sect3 xml:id="migration85.new-features.core.clone-function">
+   <title>Clone function</title>
+
+   <simpara>
+    The clone language construct is now a function and supports reassigning
+    (readonly) properties during cloning via the new
+    <property>$withProperties</property> parameter.
+    <!-- RFC: https://wiki.php.net/rfc/clone_with_v2 -->
+   </simpara>
+
+  </sect3>
+
  </sect2>
 
  <sect2 xml:id="migration85.new-features.curl">