New -read_speed prefixes "soft_force:" and "soft_corr:"

xorriso/base_obj.c

@@ -242,6 +242,8 @@ int Xorriso_new(struct XorrisO ** xorriso,char *progname, int flag)
  m->auto_close= 0;
  m->write_speed= 0;  /* max */
  m->read_speed= -2;  /* do not set */
+ m->read_speed_force= 0;
+ m->read_speed_corr= 250000; /* look back at most 0.25 seconds with _force */
  m->fs= 4*512; /* 4 MiB */
  m->padding= 300*1024;
  m->do_padding_by_libisofs= 0;