[PATCH] maint: mention when the du cycle warning bug was introduced

[Pádraig Brady]

* NEWS: Mention bug introduced in v8.1 (with commit v8.0-88-g8ba5d1a).
---
 NEWS |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/NEWS b/NEWS
index e5ea77c..4e90b79 100644
--- a/NEWS
+++ b/NEWS
@@ -53,6 +53,7 @@ GNU coreutils NEWS                                    -*- 
outline -*-
 
   du now silently ignores directory cycles introduced with bind mounts.
   Previously it would issue a warning and exit with a failure status.
+  [bug introduced in coreutils-8.1]
 
   head --bytes=-N and --lines=-N now handles devices more
   consistently, not ignoring data from virtual devices like /dev/zero,
-- 
1.7.7.6