[FYI] {maint} news: document deprecation of configure.in

[Stefano Lattarini]

* NEWS (Warnings and deprecations): We now warn if 'configure.in' is
used instead of 'configure.ac' as autoconf input.
(Future backward-incompatibilities): Adjust.

Signed-off-by: Stefano Lattarini <address@hidden>
---
 NEWS |   14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/NEWS b/NEWS
index f682bf5..cf45836 100644
--- a/NEWS
+++ b/NEWS
@@ -2,10 +2,9 @@ New in 1.12.2:
 
 * WARNING: Future backward-incompatibilities!
 
-  - Starting from either the next minor version (1.12.2) or the next major
-    version (1.13), Automake will start warning if 'configure.in' is used
-    instead of 'configure.ac' as the Autoconf input.  Future versions of
-    Automake will drop support for 'configure.in' altogether.
+  - Future versions of Automake will likely drop support for the
+    long-deprecated 'configure.in' name for the Autoconf input file.
+    You are advised to use the recommended name 'configure.ac' instead.
 
   - Autoconf 2.65 or later will be required by the next major Automake
     version (1.13).  Until now, Automake has required Autoconf version
@@ -54,6 +53,13 @@ New in 1.12.2:
     search path are looked up is probably going to be changed in the
     next Automake release (1.13).
 
+* Warnings and deprecations:
+
+  - Automake now issues a warning (in the 'portability' category) if
+    'configure.in' is used instead of 'configure.ac' as the Autoconf
+    input file.  Such a warning will also be present in the next
+    Autoconf version (2.70).
+
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 New in 1.12.1:
-- 
1.7.9.5