add boilerplate "What's New" document so the docs will build
diff --git a/Doc/Makefile b/Doc/Makefile
index a435f11..bda244a 100644
--- a/Doc/Makefile
+++ b/Doc/Makefile
@@ -122,7 +122,7 @@
 
 # The end of this should reflect the major/minor version numbers of
 # the release:
-WHATSNEW=whatsnew25
+WHATSNEW=whatsnew26
 
 # what's what
 MANDVIFILES=	paper-$(PAPER)/api.dvi paper-$(PAPER)/ext.dvi \