Problems with Control-C stopping ipcluster on Windows/Python2.6

[Brian Granger]

When ipcluster is running and you hit Control-C, it should stop all of its child processes and then exit. On Windows, under Python 2.6, doing Control-C exits immediately and doesn't stop the child processes. When using the WinbHPC scheduler, these child processe are job.exe. When I add --log-level 10 to ipcluster and then retry, I see that it looks like the job.exe processes have already exited. This could be a tough one to track down and the problem could even be in Twisted.