* Change the retry_files_enabled to False and modify the comments to reflect that
this has been disabled.
* Change the default action of retry_files_enabled to False
* Update porting guide to reflect change in default state of retry_files_enabled variable
* Change log documenting a change in default behaviour of retry_files_enabled
* Revert config change to comment out the retry_files_enabled line to let the user decided what is best.
Comment above still states how to change.
