Changed SOURCE_DATE_EPOCH effect to --set_all_file_dates "set_to_mtime"

xorriso/parse_exec.c

@@ -2584,7 +2584,7 @@ malformed:;
          1900 + gmt->tm_year, gmt->tm_mon + 1, gmt->tm_mday,
          gmt->tm_hour, gmt->tm_min, gmt->tm_sec);
  xorriso->gpt_guid_mode= 2; /* Disk GUID from vol_uuid */
- strcpy(xorriso->all_file_dates, xorriso->vol_uuid);
+ strcpy(xorriso->all_file_dates, "set_to_mtime");
  sprintf(xorriso->info_text,
          "Environment variable SOURCE_DATE_EPOCH encountered with value %s",
          sec_text);