Fix a bug with a Chrome + Apache2 mod_proxy setup.

I had a bug with the KiwiIRC server running behind Apache2 with mod_proxy, every requests to .js files received a weird response (The name of the js file was ok but the content was the index.html content O_o )

This fixed it for me. I don't really understand what caused the problem, maybe Chrome was sending bad requests or Apache2 didn't know what to answer, I don't know. I just know that this simple line fixes it.

Source: http://stackoverflow.com/a/1990668