MC-100524: Fix log files getting overwritten

https://bugs.mojang.com/browse/MC-100524

Log files were previously overwritten when more than 7 were created on the same day.  This is caused by Log4J's default behavior with DefaultRolloverStrategy, which defaults to a max of 7.

While a max of 1000 doesn't fully stop this problem from happening, for 1000 log files in a single day to be reached the server would have to restart faster than once every 1.5 minutes, which is unlikely to happen.  So 1000 seems like a good limit.  A higher max isn't used because when it gets higher, there are performance hits due to the way Log4J checks for the next file.

src/main/resources/log4j2.xml

@@ -11,6 +11,7 @@
                 <TimeBasedTriggeringPolicy />
                 <OnStartupTriggeringPolicy />
             </Policies>
+            <DefaultRolloverStrategy max="1000"/>
         </RollingRandomAccessFile>
     </Appenders>
     <Loggers>