Logging and profiling - Changing the Destination of the Crowd Log File section needs adjustment

Logging and Profiling for Crowd has a "Changing the Destination of the Crowd Log File", that mentions the following, when editing log4.properties file:

1. Look for the org.apache.log4j.RollingFileAppender entry in the 'Log File Locations' section of the file. This appender controls the default logging destination described above.

The issue is, the class {{org.apache.log4j.RollingFileAppender }}does not exist in the default log4j.properties file. That leads to a confusion on how to properly adjust logging settings.

 Documentation link: https://confluence.atlassian.com/crowd/logging-and-profiling-24248601.html

If possible, please add detailed instructions on how to change the log file destination and also how to create a new file appender.

An idea would be to use Confluence's log4j.properties file header below as starting point:

###
# LOGGING LOCATION AND APPENDER
#
# Here we define the default appender which after bootstrap will log to logs/atlassian-confluence.log
# within your configured confluence.home. Prior to that, logging will be to the console.
#
# Use the ConsoleAppender for development to leave the logging configuration up to the app server/IDEA.
#
# If you want to log to a different location uncomment the RollingFileAppender line and the File setting
# as instructed below.
###
log4j.appender.confluencelog=com.atlassian.confluence.logging.ConfluenceHomeLogAppender
# Comment the above line and uncomment the following 2 lines if you want to log to a specific location
#log4j.appender.confluencelog=org.apache.log4j.RollingFileAppender
#log4j.appender.confluencelog.File=${catalina.home}/logs/atlassian-confluence.log