[PATCH] Add rusage reporting to procstat

This patch adds a new -r flag to dump the resource usage information (what you 
would get from getrusage() or wait()) for a given process.  Sample output:

% procstat -r $$
  PID COMM             TYPE                              VALUE        
 1428 tcsh             user time                     00:00:00.050182  
 1428 tcsh             system time                   00:00:00.040145  
 1428 tcsh             maximum RSS                              3328 B
 1428 tcsh             integral shared memory                   2844 B
 1428 tcsh             integral unshared data                   6372 B
 1428 tcsh             integral unshared stack                  1152 B
 1428 tcsh             page reclaims                            1306  
 1428 tcsh             page faults                                12  
 1428 tcsh             swaps                                       0  
 1428 tcsh             block reads                                50  
 1428 tcsh             block writes                                0  
 1428 tcsh             messages sent                             172  
 1428 tcsh             messages received                           0  
 1428 tcsh             signals received                           33  
 1428 tcsh             voluntary context switches               1167  
 1428 tcsh             involuntary context switches                1  

http://www.FreeBSD.org/~jhb/patches/procstat_rusage.patch

Any thoughts, etc.?

-- 
John Baldwin