繋ぐとこうなった？
http://plan9.bell-labs.com/
<head><title>Object not found</title></head>
<body><h1>Object not found</h1>
The object / does not exist on this server.</body>

http://plan9.bell-labs.com/plan9/
<head><title>Object not found</title></head>
<body><h1>Object not found</h1>
The object /plan9/ does not exist on this server.</body>