- Update to version 2.6.0
  * Sort threads within process.
  * Individual threads within a process (key 'y') are shown in the
    order of their TID. With the additional key 'Y' threads within
    a process are sorted based on the current sort criterium.
  * Show the WCHAN per thread.
  * With the key 'W' is active, the wait channel is determined per
    thread and shown with the scheduling information (key 's').
  * Show runqueue delay per thread/process.
  * For every process (cumulated) and every thread the time spent
    waiting on the runqueue is shown as value 'RDELAY'.
  * Show other modified/new metrics:
    + PSI pressure during interval time is shown
    + Counter 'avio' (average I/O time) for fast disks in
      microseconds or nanoseconds
    + Counter 'zfarc' showing the current size of the ARC (cache)
      for ZFSonlinux
    + Counter 'swcac' showing the current size of the swap cache
    + Counter LOCKSZ showing the virtual locked memory size
  * Avoid crash with very high load average values.
  * Fix errors in reading InfiniBand states.
  * Support of rawlog files spanning multiple days.
  * The time specification to define the begin time (-b flag)
    and end time (-e flag) of both atop and atopsar is
    [YYYYMMDD]hhmm now
  * This also applies to the branch key ('b') when using atop
    interactively.
  * Support reading rawlog from a pipe.
  * Rawlog data can be read from a pipe by atop and atopsar with
    the option '-r -'. In this way, concatenated rawlog data from
    the command atopcat can be directly processed.
  * New program atopcat, the program atopcat concatenates rawlog
    files and writes this data to stdout. The output can be
    redirected to a new rawlog file or to atop/atopsar directly
    via a pipe (see option '-r -' of these commands).
    In this way e.g. weekly or monthly reports or extractions
    can be created. (forwarded request 896387 from susnux)

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