Active date

Active date

Record the date a copy first became "active" after creation in active_date.
Offer Org Unit setting for using the active date for age hold protection.
Any copy without an active_date, with age hold protect using it, will be
    protected until it has an active date. Regardless of create_date.
Circ/Hold matrix can match on item age based on active_date.

Active is defined as entering a status with copy_active set to true. By default:

Available
Checked out
Reshelving
On holds shelf
ILL
Reserves
On reservation shelf

Signed-off-by: Thomas Berezansky <tsbere@mvlc.org>
Signed-off-by: Bill Erickson <berick@esilibrary.com>