4331. [func] When loading managed signed zones detect if the

RRSIG's inception time is in the future and regenerate
                        the RRSIG immediately. [RT #41808]

bin/tests/system/dnssec/ns3/named.conf

@@ -292,6 +292,12 @@ zone "future.example" {
 	file "future.example.db.signed";
 };
 
+zone "managed-future.example" {
+	type master;
+	file "managed-future.example.db.signed";
+	allow-update { any; };
+};
+
 include "siginterval.conf";
 
 include "trusted.conf";