Bug#611572: exim4: Latest security update braks testing of user filters with exim -bf)

[Stefan Fritsch]

It seems to me that either -bf should set the 'checking' var to true or
this if block

if (!unprivileged &&                      /* originally had root AND */
    !removed_privilege &&                 /* still got root AND      */
    !daemon_listen &&                     /* not starting the daemon */
    queue_interval <= 0 &&                /* (either kind of daemon) */
      (                                   /*    AND EITHER           */
      deliver_drop_privilege ||           /* requested unprivileged  */
        (                                 /*       OR                */
        queue_interval < 0 &&             /* not running the queue   */
        (msg_action_arg < 0 ||            /*       and               */
          msg_action != MSG_DELIVER) &&   /* not delivering and      */
        (!checking || !address_test_mode) /* not address checking    */
        )
      ))
  {
  exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
  }

should include the test 'filter_test != FTEST_NONE' in the line marked
with 'not address checking'.

But such a change should probably be sent to upstream for review.