maint: add outline for future NEWS

diff --git a/NEWS b/NEWS
index 2a4db5f6dd17a12a149b8d397c81ca2d05ec8c44..9006933b6cf1902cd2826b8f668a95ec4aba6b16 100644 (file)
--- a/NEWS
+++ b/NEWS
@@ -2,6 +2,10 @@ GNU Autoconf NEWS - User visible changes.
 
 * Noteworthy changes in release ?.? (????-??-??) [?]
 
+** Backward incompatibilities
+** New features
+** Obsolete features and new warnings
+** Notable bug fixes
 
 * Noteworthy changes in release 2.70 (2020-12-08) [stable]