HTTP/1.1 200 OK
I think that you meant to enter http://localhost/. Thanks anyway, though.
Note: In case you were not aware, "Localhost" is the "friendly name" for the local loopback address on a computer, which is generally defined as IP address 127.0.0.1. From Request for Comments (RFC) 3330:
127.0.0.0/8 - This block is assigned for use as the Internet host loopback address. A datagram sent by a higher level protocol to an address anywhere within this block should loop back inside the host. This is ordinarily implemented using only 127.0.0.1/32 for loopback, but no addresses within this block should ever appear on any network anywhere [RFC1700, page 5].
For more information, see the "Localhost" page on WikiPedia.