New -stream_recording mode with start address, "on" is now 32s

xorriso/xorriso_private.h

@@ -201,7 +201,8 @@ struct XorrisO { /* the global context of xorriso */
                 /* <<< not sure whether to keep this after libisofs will have
                        learned to pad up MBR images to full MB */
 
- int do_stream_recording;
+ int do_stream_recording; /* 0=no, 1=yes, 2=for data, not for dir
+                             >=16 means yes with number as start LBA  */
 
  int keep_boot_image;
  int patch_isolinux_image;