More docs cleanup (#7552)
* More docs improvements.
* timezone: mention which versions of AIX are supported.
(cherry picked from commit 58705d5ac3)
Co-authored-by: Felix Fontein <felix@fontein.de>
* Add attributes to more modules.
* Apply suggestions from code review.
Co-authored-by: Kristian Heljas <11139388+kristianheljas@users.noreply.github.com>
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Co-authored-by: Kristian Heljas <11139388+kristianheljas@users.noreply.github.com>