zopectl run doesn't handle Ctrl-C properly

[Fred Drake]

The "zopectl run" command starts two processes:

1. a zdaemon controller

2. a debugzope application process ("Zope 3" itself)

When the user hits Control-C, the controller process exits, but the debugzope application running the script is left active. The controller should forward the SIGINT to the child process and watch for it's exit. If the process doesn't exit in a timely manner, the controller should report the failure and the child pid so that they can be dealt with by the user.