Adjust RPZ trigger counts only when the entry being deleted exists (#43386)

CHANGES

+4600.	[bug]		Adjust RPZ trigger counts only when the entry
+			being deleted exists. [RT #43386]
+
 4599.	[bug]		Fix inconsistencies in inline signing time
 			comparison that were introduced with the
 			introduction of rdatasetheader->resign_lsb.

lib/dns/rpz.c

@@ -2262,6 +2262,7 @@ del_name(dns_rpz_zones_t *rpzs, dns_rpz_num_t rpz_num,
 	dns_rbtnode_t *nmnode;
 	dns_rpz_nm_data_t *nm_data, del_data;
 	isc_result_t result;
+	isc_boolean_t exists;
 
 	/*
 	 * We need a summary database of names even with 1 policy zone,
@@ -2305,6 +2306,9 @@ del_name(dns_rpz_zones_t *rpzs, dns_rpz_num_t rpz_num,
 	del_data.wild.qname &= nm_data->wild.qname;
 	del_data.wild.ns &= nm_data->wild.ns;
 
+	exists = ISC_TF(del_data.set.qname != 0 || del_data.set.ns != 0 ||
+			del_data.wild.qname != 0 || del_data.wild.ns != 0);
+
 	nm_data->set.qname &= ~del_data.set.qname;
 	nm_data->set.ns &= ~del_data.set.ns;
 	nm_data->wild.qname &= ~del_data.wild.qname;
@@ -2326,7 +2330,8 @@ del_name(dns_rpz_zones_t *rpzs, dns_rpz_num_t rpz_num,
 		}
 	}
 
-	adj_trigger_cnt(rpzs, rpz_num, rpz_type, NULL, 0, ISC_FALSE);
+	if (exists)
+		adj_trigger_cnt(rpzs, rpz_num, rpz_type, NULL, 0, ISC_FALSE);
 }
 
 /*