运维日志如果6小时未更新，则重启运维

app/src/main/java/com/xypower/mpapp/MicroPhotoService.java

@@ -406,8 +406,8 @@ public class MicroPhotoService extends Service {
             try {
                 File mpmstLogFile = new File(MicroPhotoContext.buildMasterAppDir(context) + "logs/mlog.txt");
                 long mlogTime = mpmstLogFile.exists() ? mpmstLogFile.lastModified() : 0;
-                if ((ts - mlogTime) > 1800000 /*86400000*/) {
-                    // More than 1 day, try restart it
+                if ((ts - mlogTime) > 21600000) {
+                    // More than 6 hours, try restart it
                     Intent launchIntent = context.getPackageManager().getLaunchIntentForPackage(MicroPhotoContext.PACKAGE_NAME_MPMASTER);
                     if (launchIntent != null) {
                         launchIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TOP);