Add template 2.3 design doc

Signed-off-by: Guido Trotter <ultrotter@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

Makefile.am

@@ -173,6 +173,7 @@ docrst = \
 	doc/design-2.0.rst \
 	doc/design-2.1.rst \
 	doc/design-2.2.rst \
+	doc/design-2.3.rst \
 	doc/cluster-merge.rst \
 	doc/devnotes.rst \
 	doc/glossary.rst \

doc/design-2.3.rst

+=================
+Ganeti 2.3 design
+=================
+
+This document describes the major changes in Ganeti 2.3 compared to
+the 2.2 version.
+
+.. contents:: :depth: 4
+
+Detailed design
+===============
+
+As for 2.1 and 2.2 we divide the 2.3 design into three areas:
+
+- core changes, which affect the master daemon/job queue/locking or
+  all/most logical units
+- logical unit/feature changes
+- external interface changes (eg. command line, os api, hooks, ...)
+
+Core changes
+------------
+
+
+Feature changes
+---------------
+
+
+External interface changes
+--------------------------
+
+
+.. vim: set textwidth=72 :
+.. Local Variables:
+.. mode: rst
+.. fill-column: 72
+.. End:

doc/index.rst

@@ -17,6 +17,7 @@ Contents:
    design-2.0.rst
    design-2.1.rst
    design-2.2.rst
+   design-2.3.rst
    cluster-merge.rst
    locking.rst
    hooks.rst