MFC 222532:

MFC 222532:
- Document the -H option and 'H' key alongside other options and keys
  rather than at the bottom of the manpage.
- Remove an obsolete comment about SWAIT being a stale state.  It was
  resurrected for a different purpose in FreeBSD 5 to mark idle ithreads.
- Add a comment documenting that the SLEEP and LOCK states typically
  display the name of the event being waited on with lock names being
  prefixed with an asterisk and sleep event names not having a prefix.

git-svn-id: svn://svn.freebsd.org/base/stable/8@222948 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f