Merge branch '3707-dont-log-final-reference-detached-on-LOG_INFO-v9_18' into 'v9_18'

Don't log "final reference detached" on INFO level [v9.18]

See merge request isc-projects/bind9!7143

CHANGES

@@ -1,3 +1,7 @@
+6031.	[bug]		Move the "final reference detached" log message
+			from dns_zone unit to the DEBUG(1) log level.
+			[GL #3707]
+
 6027.	[bug]		Fix assertion failure in isc_http API used by
 			statschannel if the read callback would be called
 			on HTTP request that has been already closed.

doc/notes/notes-current.rst

@@ -54,6 +54,11 @@ Bug Fixes
 - Fix an assertion failure in the statschannel caused by reading from the HTTP
   connection closed prematurely (connection error, shutdown). :gl:`#3693`
 
+- The ``zone <name>/<class>: final reference detached`` log message was
+  moved from the INFO log level to the DEBUG(1) log level to prevent the
+  :iscman:`named-checkzone` tool from superfluously logging this message
+  in non-debug mode. :gl:`#3707`
+
 Known Issues
 ~~~~~~~~~~~~
 

lib/dns/zone.c

@@ -5813,7 +5813,8 @@ dns_zone_detach(dns_zone_t **zonep) {
 		 * Stop things being restarted after we cancel them below.
 		 */
 		DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_EXITING);
-		dns_zone_log(zone, ISC_LOG_INFO, "final reference detached");
+		dns_zone_log(zone, ISC_LOG_DEBUG(1),
+			     "final reference detached");
 		if (zone->task != NULL) {
 			/*
 			 * This zone has a task; it can clean