: Add Changelog entry to docs/Changelog v2

diff -r dedfadeadf86 docs/ChangeLog
@@ -15,7 +15,15 @@ http://lists.xensource.com/archives/html
 
 Xen 3.3 release
 ---------------
+Add greater than 16 xvd device availability
 
+The tools can now attach a disk of the form:
+(1<<28) | (device<<8) | partition
+
+to support many more xvd disks and up to 256 partitions.
+The linux guest frontend has been expanded to support
+this new construct, while legacy guests should just ignore it.
+	
 17538: Add XENPF_set_processor_pminfo
 http://xenbits.xensource.com/xen-unstable.hg?rev/5bb9093eb0e9