Fixed typo ("IP address" -> "hostname"). Reported by Andreas Ehliar.

README

@@ -20,7 +20,7 @@ XEmacs to run. There are also web clients and a MS Windows client. See
 
 A LysKOM server has been running at Lysator since July 25th 1990.  You
 can connect to it and test it out if you like to get a feel for what
-LysKOM is.  The IP address of the server is kom.lysator.liu.se.  Of
+LysKOM is.  The hostname of the server is kom.lysator.liu.se.  Of
 course, you need a client to test it.  On that particular server most
 of the discussions are done in Swedish.