Issue 50572 - After running cl-dump dbdir/cldb/*ldif.done are not deleted
    
    Description: By default, remove ldif.done files after running cl-dump.
    Add an option '-l' which allows keep the files.
    Update man files.
    
    https://pagure.io/389-ds-base/issue/50572
    
    Reviewed by: firstyear, mreynolds (Thanks!)