Is this a solution?
During the 2015 Odoo experience a presenter said it was possible to redirect old product pages to a new url by using ir.attachment. Is this possible?
<record id="old_url_product_6" model="ir.attachment">
<field name="type">binary</field>
<field name="url">/product/6</field>
<field name="name">/shop/product/6</field>
</record>