Redirect_404_Vehicles

A class that detects when requests are made for vehicles that are no longer on the site and redirects the user to that vehicle’s make archive.
So, a request for a sold or removed Subaru will redirect the user to the archive page containing all Subarus.

Redirect_404_Vehicles::maybe_redirect()

Checks to see if the request is for a vehicle that no longer exists.
If it was, it decides where to redirect the user and performs that redirect.