3991. [func] Add the ability to buffer logging output by specifying

"buffered yes;" when defining a channel. [RT #26561]

bin/tests/system/logfileconfig/ns1/named.plain

@@ -37,6 +37,13 @@ logging {
 	};
 	category default { default_log; default_debug; };
 	category lame-servers { null; };
+
+	channel query_log {
+	  file "query_log";
+	  print-time yes;
+	  buffered yes;
+	};
+	category queries { query_log; };
 };
 
 controls {