It is currently effectively (accidentaly) disabled in most cases (unless there is a full inventory exactly at given from_date), and should always be disabled.
Also, add a log when there is more than one boundary date.


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@24872 20353a03-c40f-0410-a6d1-a30d3c3de9de