[support] Getting rid of ".html" suffix in URL?

[Roy Smith]

I gave a URL for a page on my site (http://hyc.org/directions/car) to  
somebody to publish in their newsletter.  They apparently decided they  
knew better, and "corrected" the URL to have a ".html" on the end,  
i.e. published "http://hyc.org/directions/car.html".  Now they call me  
up saying their members can't get to our web site.

Is there any way to make drupal treat the .html URL as an alias for  
the correct one?  More generally, is there a way to make it do so for  
*all* URLs that end in .html?

--
roy at panix.com