allow node type to be indexed where node hasn't been individually excluded

When a check is made to see if a node can be indexed the node type variable is checked first, then if the node type can be indexed the database is checked to see if the individual node can be indexed. If there is no entry in the database because the node hasn't been updated and explicitly allowed to be indexed since the upgrade to this branch. If a node type is added and a node of that type is updated the default is to not have the checkbox checked in the node form. Thus unless a site administrator goes through all nodes of that type and checks the box, or write an update hook in a custom module to add the nodes to the database.

I would like a checkbox on the configuration page to allow for this (include by node type unless explicitly excluded) functionality.