add CHANGES note

ba7a3431 · Mark Andrews · 0db5b087 · ba7a3431
Commit ba7a3431 authored May 10, 2018 by Mark Andrews
--- a/CHANGES
+++ b/CHANGES
+4964.	[bug]		Reduce the probabilty of double signature when deleting
+			a DNSKEY by checking if the node is otherwise signed
+			by the algorithm of the key to be deleted. [GL #240]
+
 4963.	[test]		ifconfig.sh now uses "ip" instead of "ifconfig",
 			if available, to configure the test interfaces on
 			linux.  [GL #302]