Visiting an item page with a trailing slash returns a 404 message

In the XMLUI, if a person (or more likely a web spider) visits an item page with a trailing slash, a 404 message is displayed.

An example:

Suppose, that the following URL refers to a valid DSpace item page:
http://www.mydspace.edu/handle/123456789/1

Unfortunately, if you add a trailing slash, the DSpace XMLUI will return a 404 ("item not found") message:
http://www.mydspace.edu/handle/123456789/1/

The XMLUI should redirect item page URLs with a single trailing slash to the page without the trailing slash, rather than just returning a 404.