[FIXED HUDSON-7717] Killing process tree does not work anymore on slave nodes.

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@35651 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/java/hudson/model/Run.java

@@ -1707,7 +1707,7 @@ public abstract class Run <JobT extends Job<JobT,RunT>,RunT extends Run<JobT,Run
      */
     public final EnvVars getCharacteristicEnvVars() {
         EnvVars env = new EnvVars();
-        env.put("HUDSON_COOKIE",Util.getDigestOf("ServerID:"+Hudson.getInstance().getSecretKey()));
+        env.put("HUDSON_SERVER_COOKIE",Util.getDigestOf("ServerID:"+Hudson.getInstance().getSecretKey()));
         env.put("BUILD_NUMBER",String.valueOf(number));
         env.put("BUILD_ID",getId());
         env.put("BUILD_TAG","hudson-"+getParent().getName()+"-"+number);