NEWS: clarifications

Signed-off-by: Nikos Mavrogiannopoulos <nmav@gnutls.org>
diff --git a/NEWS b/NEWS
index 737f2d0..fd3c487 100644
--- a/NEWS
+++ b/NEWS
@@ -6,8 +6,9 @@
   BER encodings for OCTET STRINGs.
 - asn1_get_object_id_der: enhance the range of decoded OIDs (#25).
   This also makes OID encoding and decoding more strict on invalid
-  input.
-- asn1_object_id_der: introduced.
+  input. This may break gnutls' test suite before 3.6.12 as it was
+  relying on decoding some invalid OIDs.
+- asn1_object_id_der: New function
 
 
 * Noteworthy changes in release 4.15.0 (released 2019-11-21) [stable]