conflict of include name

[Lucas Gonze]

The name of cdk.h is in conflict with another include file from another 
project, also called cdk.h.  That other include file comes with the 
standard RH 7.2 distribution.  Sample contents of that file are:

/*
 *      The following set of definitions is used to communicate with the
 *      shared memory interface of the Stallion intelligent multiport serial
 *      boards. The definitions in this file are taken directly from the
 *      document titled "Generic Stackable Interface, Downloader and
 *      Communications Development Kit".
 */


The net result of this bug is that builds will fail for mysterious reasons
if /usr/include/linux is in the include path.

A fix is to rename cdk.h to cdkwin.h, cursesdevelopmentkit.h, etc.  
Another fix is to rename the other cdk.h.  Both of these seem unlikely.

- Lucas