[master] ChangeLog updated after 5131 merge (relay options printed)

ChangeLog

@@ -1,3 +1,8 @@
+1209.	[func]		tomek
+	Relay options are now printed in DHCPv6 when suffiently detailed
+	debug logging is requested.
+	(Trac #5131, git 5bf58b21fcf07f2e2e97275efa1f76cde913b30a)
+
 1208.	[func]		tomek
 	Global DHCPv4 and DHCPv6 parsers have been migrated to the
 	SimpleParser framework. Several parameters (renew-timer,