Add plugin logger name to file logger configuration

Closes #903

proxy/src/main/resources/log4j2.xml

@@ -32,7 +32,7 @@
     <RollingRandomAccessFile name="File" fileName="logs/latest.log"
       filePattern="logs/%d{yyyy-MM-dd}-%i.log.gz"
       immediateFlush="false">
-      <PatternLayout pattern="[%d{HH:mm:ss}] [%t/%level]: %minecraftFormatting{%msg}{strip}%n"/>
+      <PatternLayout pattern="[%d{HH:mm:ss}] [%t/%level] [%logger]: %minecraftFormatting{%msg}{strip}%n"/>
       <Policies>
         <TimeBasedTriggeringPolicy/>
         <OnStartupTriggeringPolicy/>