code: def slackpkg_update(self):
          
          NEW_ChangeLog_txt = URL(mirrors("ChangeLog.txt", "")).reading()
          if os.path.isfile(self.meta.slackpkg_lib_path + "ChangeLog.txt.old"):
              os.remove(self.meta.slackpkg_lib_path + "ChangeLog.txt.old")
          if os.path.isfile(self.meta.slackpkg_lib_path + "ChangeLog.txt"):
              shutil.copy2(self.meta.slackpkg_lib_path + "ChangeLog.txt",
                           self.meta.slackpkg_lib_path + "ChangeLog.txt.old")
              os.remove(self.meta.slackpkg_lib_path + "ChangeLog.txt")
          with open(self.meta.slackpkg_lib_path + "ChangeLog.txt", "w") as log:
              log.write(NEW_ChangeLog_txt)
              log.close()
docs: This replace slackpkg ChangeLog.txt file with new
          from Slackware official mirrors after update distribution.