Use actual logger to record Jenkins home and where it was found

core/src/main/java/hudson/WebAppMain.java

@@ -130,7 +130,7 @@ public class WebAppMain implements ServletContextListener {
             final FileAndDescription describedHomeDir = getHomeDir(event);
             home = describedHomeDir.file.getAbsoluteFile();
             home.mkdirs();
-            System.out.println("Jenkins home directory: "+home+" found at: "+describedHomeDir.description);
+            LOGGER.info("Jenkins home directory: "+ home +" found at: " + describedHomeDir.description);
 
             // check that home exists (as mkdirs could have failed silently), otherwise throw a meaningful error
             if (!home.exists())