Detect overly long CHANGES lines

util/check-line-length.sh

@@ -0,0 +1,22 @@
+# Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, you can obtain one at https://mozilla.org/MPL/2.0/.
+#
+# See the COPYRIGHT file distributed with this work for additional
+# information regarding copyright ownership.
+
+expand "$1" |
+awk -v file="$1" 'length > 80 {
+    if (logged == 0) {
+        print file ": Line Too Long"
+        logged = 1
+    }
+    print
+}
+END {
+    if (logged == 1) {
+        exit(1)
+    }
+}'