Fix name of KillClient request

- s/KillKlient/KillClient
- Keep KillClient for backwards compatibility.

lib/corereqs.js

@@ -907,11 +907,13 @@ module.exports = {
 		}
    ],
 
-   KillKlient: [
+   KillClient: [
        function(resource) {
            return [ 'CxSL', [113, 2, resource] ];
        }
    ],
+   
+   KillKlient: KillClient,
 
    SetScreenSaver: [
        function(timeout, interval, preferBlanking, allowExposures) {