LOG4J2-1341 update user manual
LOG4J2-1341 update user manual

xnslong/logging-log4j2,GFriedrich/logging-log4j2,GFriedrich/logging-log4j2,codescale/logging-log4j2,apache/logging-log4j2,xnslong/logging-log4j2,apache/logging-log4j2,xnslong/logging-log4j2,codescale/logging-log4j2,GFriedrich/logging-log4j2,codescale/logging-log4j2,apache/logging-log4j2