MFC 266293:

MFC 266293:
- Add support for dumping current resource usage for processes via a new -r
  flag to procstat.
- Add an -H flag to request information about threads rather than processes
  when dumping statistics.  Currently it is only used for -r to display
  resource usage for individual threads instead of the entire process.

git-svn-id: svn://svn.freebsd.org/base/stable/9@267979 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f