Remove mentioning of SocketServer from appender manual
Remove mentioning of SocketServer from appender manual

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