Registry_dir and other settings in config.inc.php

In comparing the config.inc.php (OJS2.4.8.5) with the config.TEMPLATE.inc.php (OJS 3.2.x) file I need this directive has been removed from 2.4.8.5.

It begs two questions.

  1. Is it needed in 3.2 and does it break something if it is in there?
  2. If I start with the config.TEMPLATE.inc.php file can copy 2.4.8.x stuff into there…do I move 2.4.8.x stuff into the 3.x config file…or ONLY update stuff that is found in the 3.c config file?

; Path to the registry directory (containing various settings files)
; Although the files in this directory generally do not contain any
; sensitive information, the directory can be moved to a location that
; is not web-accessible if desired
registry_dir = registry