return amount of processor time used by a hoc call<br>
only tested under LINUX (other UNIX systems may require changing #include -- see 'man clock') <br>
// time("job()") will return processor time required to run job<br>
// if tmstr is set then time() will run job listed there (default "run()")<br>
// prints out date before and after as well as processor time so can assess loading<br>
// if CPU is unloaded real elapsed time should equal processor time<br>