Restore nanotime

Co-authored-by: sigonasr2 <sigonasr2@gmail.com>

sigServer.java

@@ -101,7 +101,7 @@ public class sigServer {
                                                             }
                                                         }
                                                     }
-                                                    filename="upload"+filename.substring(dotPosition);
+                                                    filename="upload"+System.nanoTime()+filename.substring(dotPosition);
                                                     System.out.println("Filename: "+filename);
                                                 } else {
                                                     System.out.println(line);