Update the debug.log descriptions to emphasize that change of format …

…must not be changed (neo4j#1997)

modules/ROOT/pages/monitoring/logging.adoc

@@ -26,7 +26,9 @@ For Debian and RPM packages run `journalctl --unit=neo4j`.
 | `true`
 
 | _debug.log_
-| Logs information that is useful when investigating problems with Neo4j. It is highly recommended to keep it enabled.
+| Log information required by Neo4j Customer Support to investigate problems.
+It is highly recommended to keep it enabled and not to alter the _debug.log_ format.
+If you require the _debug.log_ messages in a different format, create an additional Appender.
 | xref:configuration/configuration-settings.adoc#config_server.logs.debug.enabled[`server.logs.debug.enabled`]
 | `true`
 
@@ -179,8 +181,11 @@ The following example shows the default configuration of the _server-logs.xml_ f
 <!--
     This is a log4j 2 configuration file.
 
-    It is highly recommended to keep the original "debug.log" as is, to make sure enough data is captured in case
-    of errors in a format that neo4j developers can work with.
+    Please do not alter the original debug.log.
+    Changing the debug.log format can interfere with Neo4j's ability to offer customer support and invalidate your support warranty.
+
+    If you require the debug.log messages in a different format, you can copy the Appender and change the filename.
+    See Neo4j documentation for details.
 
     All configuration values can be queried with the lookup prefix "config:". You can, for example, resolve
     the path to your neo4j home directory with ${config:dbms.directories.neo4j_home}.
@@ -190,7 +195,7 @@ The following example shows the default configuration of the _server-logs.xml_ f
 -->
 <Configuration status="ERROR" monitorInterval="30" packages="org.neo4j.logging.log4j"> \ #<1>
     <Appenders> \ #<2>
-        <!-- Default debug.log, please keep -->
+        <!-- Neo4j debug.log,do not change. Required by Neo4j customer support. -->
         <RollingRandomAccessFile name="DebugLog" fileName="${config:server.directories.logs}/debug.log" \ #<3>
                                  filePattern="$${config:server.directories.logs}/debug.log.%02i"> \ #<4>
             <Neo4jDebugLogLayout pattern="%d{yyyy-MM-dd HH:mm:ss.SSSZ}{GMT+0} %-5p [%c{1.}] %m%n"/> \ #<5>