file_usage_sync

Module that will check file_managed vs file_usage, find the entries not in file_usage and then see if they are in one of the fields.

Code should show up in the next week or so.

Related Issues:
#1399846-263: Make unused file 'cleanup' configurable
#1483736-11: field_attach_update deletes file fields (content & file) In entity regardless of if they are included in the entity object.
#1141912: Changing node language by moving down language list deletes files in file field
#1968442: RFC: How to prevent files from being deleted by file/media fields when unused
#2353491: File Usage count for revisions out of sync/incorrect
#2038157: $entity->original from form_state misses data added by hook_field_load()