kes Break the do_swapping into do_unload, do_swapping, and

     do_load.  It is much more logical that way.
kes  Implement a set_dcr_from_vol subroutine in acquire.c for
     reading volumes. This allows the dcr to be refreshed after being
     zapped when the wrong volume is mounted.
     This should fix bug #1126 -- During multiple tape restore, bacula
     does not ask for physical tape change, but rereads same tape