New command -iso_nowtime to set fixed timestamp for synthetic files

xorriso/base_obj.c

@@ -312,6 +312,8 @@ int Xorriso_new(struct XorrisO ** xorriso,char *progname, int flag)
  m->vol_effective_time= 0;
  m->vol_uuid[0]= 0;
  m->all_file_dates[0]= 0;
+ m->do_override_now_time= 0;
+ m->now_time_override= 0;
 
 #ifdef Xorriso_with_libjtE
  m->libjte_handle= NULL;