fixed URL.

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@4685 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/resources/hudson/model/ExternalJob/newJobDetail.jelly

@@ -2,5 +2,5 @@
   This type of job allows you to record the execution of a process run outside Hudson
   (perhaps even on a remote machine.) This is designed so that you can use Hudson
   as a dashboard of your existing automation system. See
-  <a href="https://hudson.dev.java.net/cron.html">the documentation for more details.</a>
+  <a href="http://hudson.gotdns.com/wiki/display/HUDSON/Monitoring+external+jobs">the documentation for more details.</a>
 </div>
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