Prepare for 2.21 cycle to start soonish

Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/RelNotes/2.21.0.txt

@@ -0,0 +1,22 @@
+Git 2.21 Release Notes
+======================
+
+Backward Compatibility Notes
+----------------------------
+
+
+Updates since v2.20
+-------------------
+
+UI, Workflows & Features
+
+
+
+Performance, Internal Implementation, Development Support etc.
+
+
+
+Fixes since v2.20
+-----------------
+
+ * Code cleanup, docfix, build fix, etc.

GIT-VERSION-GEN

@@ -1,7 +1,7 @@
 #!/bin/sh
 
 GVF=GIT-VERSION-FILE
-DEF_VER=v2.20.0
+DEF_VER=v2.20.GIT
 
 LF='
 '

RelNotes

@@ -1 +1 @@
-Documentation/RelNotes/2.20.0.txt
+Documentation/RelNotes/2.21.0.txt