Add CHANGES entry

5006.	[cleanup]	Code preparing a delegation response was extracted from
			query_delegation() and query_zone_delegation() into a
			separate function in order to decrease code
			duplication. [GL #431]

CHANGES

+5006.	[cleanup]	Code preparing a delegation response was extracted from
+			query_delegation() and query_zone_delegation() into a
+			separate function in order to decrease code
+			duplication. [GL #431]
+
 5005.	[bug]		dnssec-verify, and dnssec-signzone at the verification
 			step, failed on some validly signed zones. [GL #442]