New (yet inofficial) -as mkisofs option -hfsplus-serial-no

xorriso/xorriso_private.h

@@ -400,6 +400,11 @@ struct XorrisO { /* the global context of xorriso */
  */
  char ascii_disc_label[Xorriso_disc_label_sizE];
 
+ /* HFS+ image serial number.
+    00...00 means that it shall be generated by libisofs.
+ */
+ uint8_t hfsp_serial_number[8];
+
  /* User settable PVD time stamps */
  time_t vol_creation_time;
  time_t vol_modification_time;