Currently, if a client reserves a job and then crashes, the job will be put in the ready queue with no indication that it had ever been reserved. This is not good; clients should be able to distinguish such a job from one that has never been reserved.
So we should add a "reserves" counter and/or increment the "timeouts" counter in this situation and/or introduce a separate counter just for this situation.
See http://groups.google.com/group/beanstalk-talk/t/951b6c35752257a4 for more info.
add 'reserves' counter per job