ARTEMIS-4492: update logging docs to match current config after ARTEMIS-4428

docs/user-manual/logging.adoc

@@ -98,7 +98,9 @@ The following is an example `log4j2.properties` for a client application, loggin
 # Monitor config file every X seconds for updates
 monitorInterval = 5
 
-rootLogger = INFO, console, log_file
+rootLogger.level = INFO
+rootLogger.appenderRef.console.ref = console
+rootLogger.appenderRef.log_file.ref = log_file
 
 logger.activemq.name=org.apache.activemq
 logger.activemq.level=INFO
@@ -144,16 +146,19 @@ These three audit loggers are disabled by default in the broker `log4j2.properti
 ----
 ...
 # Audit loggers: to enable change levels from OFF to INFO
-logger.audit_base = OFF, audit_log_file
 logger.audit_base.name = org.apache.activemq.audit.base
+logger.audit_base.level = OFF
+logger.audit_base.appenderRef.audit_log_file.ref = audit_log_file
 logger.audit_base.additivity = false
 
-logger.audit_resource = OFF, audit_log_file
 logger.audit_resource.name = org.apache.activemq.audit.resource
+logger.audit_resource.level = OFF
+logger.audit_resource.appenderRef.audit_log_file.ref = audit_log_file
 logger.audit_resource.additivity = false
 
-logger.audit_message = OFF, audit_log_file
 logger.audit_message.name = org.apache.activemq.audit.message
+logger.audit_message.level = OFF
+logger.audit_message.appenderRef.audit_log_file.ref = audit_log_file
 logger.audit_message.additivity = false
 ...
 ----
@@ -161,11 +166,11 @@ logger.audit_message.additivity = false
 To _enable_ the audit log change the level to `INFO`, like this:
 
 ----
-logger.audit_base = INFO, audit_log_file
+logger.audit_base.level = INFO
 ...
-logger.audit_resource = INFO, audit_log_file
+logger.audit_resource.level = INFO
 ...
-logger.audit_message = INFO, audit_log_file
+logger.audit_message.level = INFO
 ----
 
 The 3 audit loggers can be disable/enabled separately.