Copyright for readline library

I would use readline instead of editline to build ghc6 on Debian, but the readline library package in Hackage has a problem. I downloaded version 1.0.1.0 from http://hackage.haskell.org/cgi-bin/hackage-scripts/package/readline and found this in System/Console/Readline.hsc: -- Module : System.Console.Readline -- Copyright : (c) unknown I'm afraid I can't use it as it is. Is there anything I could do to help to find the correct attribution for this file?

On Sat, Jan 17, 2009 at 11:15:25AM +0200, Kari Pahula wrote:
I would use readline instead of editline to build ghc6 on Debian, but
In the end, I didn't. At first, it wouldn't detect and use libedit-dev but on the later builds, I saw that it did. Some problem between the chair and the monitor, most likely. Still, this doesn't look good and bears to be fixed, IMHO:
-- Copyright : (c) unknown
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Kari Pahula