[v9_9] accept >4g max-{,a}cache-size

3505.	[bug]		When setting "max-cache-size" and "max-acache-size",
			larger values than 4 gigabytes could not be set
			explicitly, though larger sizes were available
			when setting cache size to 0. This has been
			corrected; the full range is now available.
			[RT #32358]
(cherry picked from commit 2a184ff865)

bin/tests/system/checkconf/good.conf

@@ -66,6 +66,7 @@ options {
 	serial-queries 10;
 	serial-query-rate 100;
 	server-id none;
+	max-cache-size 20000000000000;
 	zone-statistics none;
 };
 view "first" {