New -volume_date mode "all_file_dates"

xorriso/xorriso_private.h

@@ -528,6 +528,8 @@ struct XorrisO { /* the global context of xorriso */
  /* To eventually override vol_modification_time by unconverted string
     and timezone 0 */
  char vol_uuid[17];
+ /* To flatly set all file timestamps to the same value */
+ char all_file_dates[80];
 
 #ifdef Xorriso_with_libjtE
  /* Parameters and state of Jigdo Template Export environment */