Fulfill Order with New Stock plg_hikashop_bfcanfulfillorder

This plugin allows a customer to order more items than those currently in stock.
Requires a numeric Hikashop custom field on the product table with column name : product_bfcanfulfillorder_qty.
Each product assigned one of the following values:

• -1 : Unlimited overordering.
•  0 : Default Hikashop quantity handling.
•  1 : One item can be overordered.
•  2 : Two items can be overordered.
• ... etc ...
• 10 : Ten items can be overordered.
• ... etc ...

Optionally you can also include a Hikashop custom field on the product table with column name : product_bfcanfulfillorder_msg.
You can use this to display the delivery time when there is insufficient stock at time of ordering. This message is translatable.